Pass USE_SDL to ciolib build (!)

Pass STATIC_SDL to uifc and ciolib builds.

src/build/Common.bmake

@@ -239,6 +239,8 @@ ciolib-mt:
 	set RELEASE=$(RELEASE)
 	set VERBOSE=$(VERBOSE)
 	set BUILDPATH=$(BUILDPATH)
+	set USE_SDL=$(USE_SDL)
+	set STATIC_SDL=$(STATIC_SDL)
 	cd $(CIOLIB_SRC)
 	$(MAKE) -$(MAKEFLAGS) mtlib
 	exit
@@ -266,6 +268,7 @@ uifc-mt:
 	set VERBOSE=$(VERBOSE)
 	set BUILDPATH=$(BUILDPATH)
 	set USE_SDL=$(USE_SDL)
+	set STATIC_SDL=$(STATIC_SDL)
 	cd $(UIFC_SRC)
 	$(MAKE) -$(MAKEFLAGS) mtlib
 	exit