kernel: scripts/localversion: Check if the git repo is actually a kernel repo

This fixes the module loading problem.

target/linux/generic-2.6/patches-2.6.31/997-scripts-localversion-check-git-repo-path.patch

@@ -0,0 +1,20 @@
+diff --git a/scripts/setlocalversion b/scripts/setlocalversion
+index 46989b8..887960f 100755
+--- a/scripts/setlocalversion
++++ b/scripts/setlocalversion
+@@ -18,6 +18,7 @@ cd "${1:-.}" || usage
+ 
+ # Check for git and a git repo.
+ if head=`git rev-parse --verify --short HEAD 2>/dev/null`; then
++if [ `git rev-parse --git-dir` = ".git" ]; then
+ 
+ 	# If we are at a tagged commit (like "v2.6.30-rc6"), we ignore it,
+ 	# because this version is defined in the top level Makefile.
+@@ -51,6 +52,7 @@ if head=`git rev-parse --verify --short HEAD 2>/dev/null`; then
+ 	# All done with git
+ 	exit
+ fi
++fi
+ 
+ # Check for mercurial and a mercurial repo.
+ if hgid=`hg id 2>/dev/null`; then