(Makefile): Execute configure.frag from srcdir.

From-SVN: r14317

gcc/Makefile.in

@@ -651,7 +651,7 @@ T =
 Makefile: $(srcdir)/Makefile.in $(srcdir)/configure $(srcdir)/version.c \
    $(xmake_file) $(tmake_file) \
    $(LANG_MAKEFILES)
-	$(SHELL) configure.frag $(srcdir) "$(SUBDIRS)"
+	$(SHELL) $(srcdir)/configure.frag $(srcdir) "$(SUBDIRS)"
 	cp config.status config.run
 	$(SHELL) config.run
 	rm -f config.run