libtasn1: upgrade 4.14 -> 4.15.0

Remove backported patches and explicitly pass -std=gnu99 to native CFLAGS
to make sure build passes on older and still supported OSes like CentOS 7.

(From OE-Core rev: cc84d4dcc775c371389e1d351256946cbd003545)

Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-support/gnutls/libtasn1/fix-gtkdoc.patch

@@ -1,38 +0,0 @@
-Upstream-Status: Backport [https://gitlab.com/gnutls/libtasn1/merge_requests/49]
-Signed-off-by: Ross Burton <ross.burton@intel.com>
-
-From ebd4f871b5241809f6a5b461444a6d331e15c949 Mon Sep 17 00:00:00 2001
-From: Ross Burton <ross.burton@intel.com>
-Date: Mon, 9 Sep 2019 13:11:39 +0100
-Subject: [PATCH] doc/reference: don't add empty object hierarchy chapter
-
-The object hierarchy section is empty because there are no GObjects in the
-libtasn1 API.  With gtk-doc 1.30 onwards if there are no objects then the object
-hierarchy file won't exist, resulting in a failure when building the
-documentation:
-
-| ../libtasn1-docs.xml:39: element include: XInclude error : could not load ../xml/tree_index.sgml, and no fallback was found
-
-Signed-off-by: Ross Burton <ross.burton@intel.com>
----
- doc/reference/libtasn1-docs.xml | 4 ----
- 1 file changed, 4 deletions(-)
-
-diff --git a/doc/reference/libtasn1-docs.xml b/doc/reference/libtasn1-docs.xml
-index accdb85..f88b888 100644
---- a/doc/reference/libtasn1-docs.xml
-+++ b/doc/reference/libtasn1-docs.xml
-@@ -34,10 +34,6 @@
-         <xi:include href="xml/libtasn1.xml"/>
- 
-   </chapter>
--  <chapter id="object-tree">
--    <title>Object Hierarchy</title>
--    <xi:include href="xml/tree_index.sgml"/>
--  </chapter>
-   <index id="api-index-full">
-     <title>API Index</title>
-     <xi:include href="xml/api-index-full.xml"><xi:fallback /></xi:include>
--- 
-2.20.1
-

meta/recipes-support/gnutls/libtasn1/fix-ldflags.patch

@@ -1,31 +0,0 @@
-From a6f93b7ace347bc4fe29eb4a8fe4383d786cc8d0 Mon Sep 17 00:00:00 2001
-From: =?UTF-8?q?Tim=20R=C3=BChsen?= <tim.ruehsen@gmx.de>
-Date: Tue, 23 Jul 2019 20:44:01 +0200
-Subject: [PATCH] Fix LDFLAGS to AM_LDFLAGS in src/Makefile.am
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-
-Signed-off-by: Tim Rühsen <tim.ruehsen@gmx.de>
-Upstream-Status: Backport
-Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
----
- src/Makefile.am | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/src/Makefile.am b/src/Makefile.am
-index 5bf3622..4459767 100644
---- a/src/Makefile.am
-+++ b/src/Makefile.am
-@@ -21,7 +21,7 @@ AM_CPPFLAGS = -I$(top_builddir)/lib/includes -I$(top_srcdir)/lib/includes \
-  -I$(top_builddir)/lib/gl -I$(top_srcdir)/lib/gl $(CODE_COVERAGE_CPPFLAGS)
- 
- LDADD = ../lib/libtasn1.la
--LDFLAGS = $(CODE_COVERAGE_LDFLAGS)
-+AM_LDFLAGS = $(CODE_COVERAGE_LDFLAGS)
- 
- bin_PROGRAMS = asn1Parser asn1Coding asn1Decoding
- 
--- 
-2.21.0
-

meta/recipes-support/gnutls/libtasn1_4.15.0.bb

@@ -10,15 +10,15 @@ LIC_FILES_CHKSUM = "file://doc/COPYING;md5=d32239bcb673463ab874e80d47fae504 \
 
 SRC_URI = "${GNU_MIRROR}/libtasn1/libtasn1-${PV}.tar.gz \
            file://dont-depend-on-help2man.patch \
-           file://fix-ldflags.patch \
-           file://fix-gtkdoc.patch \
            "
 
 DEPENDS = "bison-native"
 
-SRC_URI[md5sum] = "e9918200ed4a778e2b3cbe34c1be4205"
-SRC_URI[sha256sum] = "9e604ba5c5c8ea403487695c2e407405820d98540d9de884d6e844f9a9c5ba08"
+SRC_URI[md5sum] = "33e3fb5501bb2142184238c815b0beb8"
+SRC_URI[sha256sum] = "dd77509fe8f5304deafbca654dc7f0ea57f5841f41ba530cff9a5bf71382739e"
 
 inherit autotools texinfo lib_package gtk-doc
 
+CFLAGS_append_class-native = " -std=gnu99"
+
 BBCLASSEXTEND = "native nativesdk"