build: Avoid phony `pixman` target in test/Makefile.win32

Instead of explicitly depending on "pixman" for the "all" and "check"
targets, rely on the dependency to the .lib file

Signed-off-by: Andrea Canciani <ranma42@gmail.com>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
1 file changed