Add a forgotten patch

gnome-session-2.9.4-gnome-common.patch

@@ -0,0 +1,11 @@
+--- gnome-session-2.9.4/configure.in.gnome-common	2005-02-02 16:31:39.000000000 -0500
++++ gnome-session-2.9.4/configure.in	2005-02-02 16:31:59.000000000 -0500
+@@ -18,8 +18,6 @@
+ dnl make sure we keep ACLOCAL_FLAGS around for maintainer builds to work
+ AC_SUBST(ACLOCAL_AMFLAGS, "\${ACLOCAL_FLAGS}")
+ 
+-GNOME_COMPILE_WARNINGS(yes)
+-
+ AC_ARG_ENABLE(deprecations,
+               [AC_HELP_STRING([--enable-deprecations],
+                               [warn about deprecated usages [default=no]])],,