Expand MJIT_CC on mswin too

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65608 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

win32/setup.mak

@@ -238,6 +238,10 @@ MACHINE = x86
 # RFLAGS = -r
 # EXTLIBS =
 CC = cl -nologo
+<<
+	@for %I in (cl.exe) do @echo MJIT_CC = %~$$PATH:I>>$(MAKEFILE)
+	@type << >>$(MAKEFILE)
+MJIT_CC = "$$(MJIT_CC:\=/)" -nologo
 
 $(BANG)include $$(srcdir)/win32/Makefile.sub
 <<