sddm: bump revision

Install the latest revision from the 'develop' branch.

This fixes an issue I had with the 0.21.0 release.

More specifically, in the latest revision, the PAM files have been
removed, distros are now responsible for providing the necessary PAM
files in /etc/pam.d.

This fixes an issue I had wrt to the sddm-greeter file which defaulted
to the debian ones (probably a Yocto installation issue) and was
causing a black screen when logging out of the session.

Note: the sddm-greeter file comes from the Arch PAM modules that
previously shipped with sddm.

Note: I removed the 0001-Workaround-missing-sessions.patch patch since
I do not think we are affected by this issue: all wayland session
files ship with the full path and the TryExec variable is set
correctly. I also searched sddm's issues on GH and did not find
anything related to this issue so my guess is that we can safely drop
it.

Signed-off-by: Marc Ferland <marc.ferland@sonatest.com>

recipes-support/sddm/sddm.inc

@@ -25,7 +25,6 @@ DEPENDS = " \
 
 SRC_URI = " \
     git://github.com/sddm/${BPN};nobranch=1;protocol=https \
-    file://0001-Workaround-missing-sessions.patch \
     file://sddm.conf.plasma-desktop \
     file://sddm.conf.plasma-mobile \
     file://sddm.conf.plasma-bigscreen \
@@ -65,6 +64,7 @@ do_install:append() {
     install -d ${D}${sysconfdir}/pam.d
     install -m 644 ${WORKDIR}/sddm.pam ${D}${sysconfdir}/pam.d/sddm
     install -m 644 ${WORKDIR}/sddm-autologin.pam ${D}${sysconfdir}/pam.d/sddm-autologin
+    install -m 644 ${WORKDIR}/sddm-greeter.pam ${D}${sysconfdir}/pam.d/sddm-greeter
 
     install -d ${D}${localstatedir}/lib/sddm
     chown -R sddm:sddm ${D}${localstatedir}/lib/sddm

recipes-support/sddm/sddm/0001-Workaround-missing-sessions.patch

@@ -1,55 +0,0 @@
-From cc0c929db02116516bb3475e5fd3ae7f43c88220 Mon Sep 17 00:00:00 2001
-From: =?UTF-8?q?Andreas=20M=C3=BCller?= <schnitzeltony@gmail.com>
-Date: Sun, 25 Nov 2018 00:29:17 +0100
-Subject: [PATCH] Workaround missing sessions
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-
-The current approach is wrong in many ways:
-
-* In case a session file does not set TryExec it is kept enabled accidentlty
-* Session files with TryExec without full path are ignored. Problem here: sddm
-  tries to find executables based on PATH environment. Problem at least for my
-  environment: There is no PATH variable set by systemd. So for session files
-  without path: Do not perform further checks / just trust for now.
-
-Upstream-Sttaus: Pending
-
-Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>
-
----
- src/greeter/SessionModel.cpp | 19 ++++---------------
- 1 file changed, 4 insertions(+), 15 deletions(-)
-
-diff --git a/src/greeter/SessionModel.cpp b/src/greeter/SessionModel.cpp
-index 58d8764..c2b5884 100644
---- a/src/greeter/SessionModel.cpp
-+++ b/src/greeter/SessionModel.cpp
-@@ -138,22 +138,11 @@ namespace SDDM {
-         for (auto& session : qAsConst(sessions)) {
-             Session *si = new Session(type, session);
-             bool execAllowed = true;
--            QFileInfo fi(si->tryExec());
--            if (fi.isAbsolute()) {
--                if (!fi.exists() || !fi.isExecutable())
-+            if(!si->tryExec().isEmpty()) {
-+                QFileInfo fi(si->tryExec());
-+                if (fi.isAbsolute()) {
-+                    if (!fi.exists() || !fi.isExecutable())
-                     execAllowed = false;
--            } else {
--                execAllowed = false;
--                QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
--                QString envPath = env.value(QStringLiteral("PATH"));
--                const QStringList pathList = envPath.split(QLatin1Char(':'));
--                for(const QString &path : pathList) {
--                    QDir pathDir(path);
--                    fi.setFile(pathDir, si->tryExec());
--                    if (fi.exists() && fi.isExecutable()) {
--                        execAllowed = true;
--                        break;
--                    }
-                 }
-             }
-             // add to sessions list

recipes-support/sddm/sddm/sddm-greeter.pam

@@ -0,0 +1,17 @@
+#%PAM-1.0
+
+# Load environment from /etc/environment and ~/.pam_environment
+auth		required pam_env.so
+
+# Always let the greeter start without authentication
+auth		required pam_permit.so
+
+# No action required for account management
+account		required pam_permit.so
+
+# Can't change password
+password	required pam_deny.so
+
+# Setup session
+session		required pam_unix.so
+session		optional pam_systemd.so

recipes-support/sddm/sddm_0.21.0.bb

@@ -2,4 +2,4 @@
 # SPDX-License-Identifier: CC0-1.0
 
 require ${PN}.inc
-SRCREV = "63780fcd79f1dbf81a30eef48c28c699ab15aded"
+SRCREV = "4ec29a8bba033d475f197693fac6cb0c383a1da2"