contrib: projectM: disable package not usable on Winstore builds

uses OpenGL which is not available

contrib/src/projectM/rules.mak

@@ -5,10 +5,12 @@ PROJECTM_URL := $(SF)/projectm/$(PROJECTM_VERSION)/projectM-$(PROJECTM_VERSION)-
 ifdef HAVE_WIN32
 ifneq ($(ARCH),arm)
 ifneq ($(ARCH),aarch64)
+ifndef HAVE_WINSTORE
 PKGS += projectM
 endif
 endif
 endif
+endif
 ifeq ($(call need_pkg,"libprojectM"),)
 PKGS_FOUND += projectM
 endif