Unset locale when validating directory names

This commit resolves the "Invalid collation character" error thrown by
'grep' when validating directory names with special characters. It sets
locale to "C" before running 'grep'.

Change-Id: Ia005744cfc1799dff0148602bcb99d947f8c805d

Author: jserv

scripts/pre-commit.hook

@@ -99,7 +99,7 @@ RETURN=0
 
 # Disallow non-ASCII characters in workspace path
 workspace=$(git rev-parse --show-toplevel)
-if echo "$workspace" | grep -q "[一-龥]"; then
+if echo "$workspace" | LC_ALL=C grep -q "[一-龥]"; then
   throw "The workspace path '$workspace' contains non-ASCII characters."
 fi