Simplify macOS build system to work with brew.

Standalone framework-based builds will be reintroduced before the
v0.7.1 release.

sc2/build/unix/config_proginfo_host

@@ -54,14 +54,6 @@ SYSTEM_HOST_LDFLAGS=""
 ### SDL ###
 LIB_SDL_NAME="Simple DirectMedia Layer"
 case "$HOST_SYSTEM" in
-	Darwin)
-		LIB_SDL_CFLAGS='-F/Library/Frameworks/ -framework SDL'
-		LIB_SDL_LDFLAGS='-F/Library/Frameworks/ -framework SDL -framework Cocoa -lobjc'
-		LIB_SDL_VERSION=$(echo \
-                      "SDL_MAJOR_VERSION.SDL_MINOR_VERSION.SDL_PATCHLEVEL" | \
-                      gcc -E $SYSTEM_HOST_CFLAGS $LIB_SDL_CFLAGS -include SDL/SDL_version.h $LIB_SDL_LDFLAGS - | \
-                      tail -1 | tr -d ' ')
-		;;
 	WINSCW|GCCE)
 		LIB_SDL_CFLAGS='-I$BUILD_EPOCROOT/epoc32/include/SDL'
 		LIB_SDL_LDFLAGS=''		
@@ -203,7 +195,7 @@ case "$HOST_SYSTEM" in
 		;;
 	Darwin)
 		LIB_vorbisfile_CFLAGS="-D__MACOSX__"
-		LIB_vorbisfile_LDFLAGS="-framework Ogg -framework Vorbis"
+		LIB_vorbisfile_LDFLAGS="-lvorbisfile -lvorbis"
 		;;
 	QNX)
 		LIB_vorbisfile_CFLAGS=""