shadow: fixed disable_groups() to mangle Makefile.in instead of pre-genrated Makefiles

base/shadow/shadow.conf

@@ -25,8 +25,8 @@ fi
 disable_groups() {
 	echo_status "Disabling groups command..."
 	echo_status "Using groups command provided by coreutils..."
-	sed 's/groups$(EXEEXT) //' -i.orig src/Makefile
-	find man -name Makefile -exec sed 's/groups\.1 //' -i.orig '{}' \;
+	sed 's/groups$(EXEEXT) //' -i.orig src/Makefile.in
+	find man -name Makefile.in -exec sed 's/groups\.1 / /' -i.orig '{}' \;
 }
 hook_add premake 3 "disable_groups"