Modify SDL makefile to use the same CFLAGS on 64 bit builds

SDL_CFLAGS variable was only being added to 32 bit builds.  Now
SDL_CFLAGS is added to both 32 and 64 bit builds.

Change-Id: I0f53d0a57db6d25618b9f9c647214690cf8b9c75
diff --git a/distrib/sdl-1.2.15/sources.make b/distrib/sdl-1.2.15/sources.make
index 0c988ce..2e1af2b 100644
--- a/distrib/sdl-1.2.15/sources.make
+++ b/distrib/sdl-1.2.15/sources.make
@@ -268,6 +268,7 @@
 
 $(call start-emulator64-library,emulator_lib64SDLmain)
 LOCAL_C_INCLUDES += $(LOCAL_PATH)/include
+LOCAL_CFLAGS += $(SDL_CFLAGS)
 LOCAL_SRC_FILES := $(SDLMAIN_SOURCES)
 $(call end-emulator-library)