kwin: Fix missing xmllint build error

Summary:
To avoid this build error:
    Error: Could not find xmllint
specify libxslt-native as a dependency.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

Reviewers: vkrause

Reviewed By: vkrause

Differential Revision: https://phabricator.kde.org/D14169

recipes-plasma/kwin.inc

@@ -34,6 +34,7 @@ DEPENDS = " \
     fontconfig \
     libepoxy \
     libinput \
+    libxslt-native \
 "
 
 SRC_URI = " \