fix make to detect version

Author: Vladimir Ershov

Makefile

@@ -24,10 +24,10 @@ else
 	subdir = contrib/pgpro_scheduler
 	top_builddir = ../..
 	include $(top_builddir)/src/Makefile.global
-	include $(top_srcdir)/contrib/contrib-global.mk
 	ifneq ($(MAJORVERSION),10)
 		PG_CPPFLAGS = -D_WITH_MTM -I$(top_srcdir)/contrib/mmts -I$(libpq_srcdir)
 	endif
+	include $(top_srcdir)/contrib/contrib-global.mk
 endif
 
 #check: temp-install