Windows: Fix libSDLmain compilation

Ensure that SDL_CFLAGS is passed to LOCAL_CFLAGS when building the
libSDLmain libraries. Otherwise, on Windows, the NO_STDIO_REDIRECT
macro is not defined which prevents the emulator binary from dumping
its output to the command-line as it should (instead, stdout.txt and
stderr.txt were used).

Change-Id: I4e0776dbdae69594475dd77262c9a6848af8fffc
1 file changed