targets/xvmc: export only necessary symbols

Export only XvMC* symbols for the xvmc targets.

Tested-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>

src/gallium/Automake.inc

@@ -65,11 +65,11 @@ GALLIUM_VDPAU_LINKER_FLAGS = \
 	-shared \
 	-no-undefined
 
-# TODO: add -export-symbols-regex
 GALLIUM_XVMC_LINKER_FLAGS = \
 	-module \
 	-version-number $(XVMC_MAJOR):$(XVMC_MINOR) \
 	-shared \
+	-export-symbols-regex '^XvMC' \
 	-no-undefined
 
 GALLIUM_VDPAU_LIB_DEPS = \