gnome-control-center: Don't abort on failing check

The test-datetime-gfx check fails because it is missing a not yet
installed data file. This causes the musl build process to abort,
while the glibc build continues.

This patch makes the Makefile continue on errors in datetime checks.

srcpkgs/gnome-control-center/patches/musl-nofail-tests.patch

@@ -0,0 +1,30 @@
+Don't fail the build if the test-timezone-gfx or test-endianess checks fail
+The former fails because it expects /usr/share/gnome-control-center/datetime/backward
+to be installed, which isn't the case when the check is run.
+
+--- panels/datetime/Makefile.am
++++ panels/datetime/Makefile.am
+@@ -43,8 +43,8 @@
+ all-local: check-local
+ 
+ check-local: test-timezone-gfx test-endianess test-timezone
+-	$(builddir)/test-timezone-gfx $(srcdir)/data
+-	$(builddir)/test-endianess
++	-$(builddir)/test-timezone-gfx $(srcdir)/data
++	-$(builddir)/test-endianess
+ #	$(builddir)/test-timezone
+ 
+ noinst_LTLIBRARIES = libdate_time.la
+--- panels/datetime/Makefile.in
++++ panels/datetime/Makefile.in
+@@ -1324,8 +1324,8 @@
+ all-local: check-local
+ 
+ check-local: test-timezone-gfx test-endianess test-timezone
+-	$(builddir)/test-timezone-gfx $(srcdir)/data
+-	$(builddir)/test-endianess
++	-$(builddir)/test-timezone-gfx $(srcdir)/data
++	-$(builddir)/test-endianess
+ timedated.c: timedated.h
+ timedated.h: Makefile.am timedated1-interface.xml
+ 	gdbus-codegen						\

srcpkgs/gnome-control-center/template

@@ -1,7 +1,7 @@
 # Template file for 'gnome-control-center'
 pkgname=gnome-control-center
 version=3.16.2
-revision=1
+revision=2
 build_style=gnu-configure
 configure_args="--disable-static --with-cheese"
 short_desc="The GNOME control center"