prevent cairo from using -flto with clang, cairo uses it incorrectly

The option should be used also at link time (as e.g. the gcc man page says),
but cairo doesn't do so, and since -flto makes clang generate .o with LLVM
bytecode, plain ld chokes on it.

Change-Id: Ia5ce9a98afa4f88b8d0943a5971450d7009af913

cairo/UnpackedTarball_cairo.mk

@@ -41,4 +41,10 @@ ifneq (,$(filter ANDROID IOS,$(OS)))
 $(eval $(call gb_UnpackedTarball_add_file,cairo,.,cairo/cairo/dummy_pkg_config))
 endif
 
+ifeq ($(COM_GCC_IS_CLANG),TRUE)
+$(eval $(call gb_UnpackedTarball_add_patches,cairo,\
+	cairo/cairo/no-flto-clang.patch \
+))
+endif
+
 # vim: set noet sw=4 ts=4:

cairo/cairo/no-flto-clang.patch

+--- misc/cairo-1.10.2/configure.sav	2013-06-26 15:00:42.000000000 +0200
++++ misc/cairo-1.10.2/configure	2013-06-26 15:03:36.995117032 +0200
+@@ -17236,7 +17236,7 @@ MAYBE_WARN="-Wall -Wextra \
+ MAYBE_WARN="$MAYBE_WARN -erroff=E_ENUM_TYPE_MISMATCH_ARG \
+ 			-erroff=E_ENUM_TYPE_MISMATCH_OP"
+ 
+-MAYBE_WARN="$MAYBE_WARN -fno-strict-aliasing -fno-common -flto"
++MAYBE_WARN="$MAYBE_WARN -fno-strict-aliasing -fno-common"
+ 
+ MAYBE_WARN="$MAYBE_WARN -Wp,-D_FORTIFY_SOURCE=2"
+