bootstrap: do not link Makefile* files

* bootstrap: Do not symlink any Makefile* files, not just Makefile.am
and Makefile.in.

Reported-by: Christopher Covington <cov@codeaurora.org>
diff --git a/bootstrap b/bootstrap
index 86598b2..9288479 100755
--- a/bootstrap
+++ b/bootstrap
@@ -7,7 +7,7 @@
 		tests/Makefile.am > tests$m/Makefile.am
 	for f in tests/*; do
 		case "${f##*/}" in
-		Makefile.am|Makefile.in) continue;;
+		Makefile*) continue;;
 		esac
 		ln -s ../"$f" tests$m/
 	done