Win32: Remove intermediate files for rubyspec-capiext

Author: nobu

win32/Makefile.sub

@@ -1496,6 +1496,7 @@ rubyspec-capiext: $(RUBYSPEC_CAPIEXT_EXTS)
 	$(Q)$(LDSHARED_1)
 	$(Q)$(LDSHARED_2)
 !endif
+	$(Q)$(RM) $*.def $*.exp $*.lib $*.obj $*.pdb
 
 exts: rubyspec-capiext