Testsuite: Let modules.sh ignore the .git directory

t/modules.t failed if a git commit message had a line starting with
"use ".

t/modules.sh

@@ -25,7 +25,7 @@ use Test::More qw( no_plan );
 EOF
 
 
-for i in `grep '^use ' -r .. | grep -v Expect | grep -v POSIX | grep -v Xen:: | awk '{print $2}' | tr -d 
+for i in `grep '^use ' -r .. | egrep -v '^\./\.git/' | grep -v Expect | grep -v POSIX | grep -v Xen:: | awk '{print $2}' | tr -d 
 \;\(\) | sort | uniq`; \
     do \
      echo "BEGIN{ use_ok( '$i' ); }"; \