Make sure we have physical path back from mktemp

Darwin actually symlinks /var inside /private, but mktemp reports back
the logical pathat time of file creation.  So make sure we always get
the full physical path to be absolutely certain when doing comparisons
later, because thats how the Ruby status_shortcuts.rb script is going to
obtain them.

test/lib/git/status_shortcuts_test.sh

@@ -29,6 +29,7 @@ oneTimeSetUp() {
   export ga_auto_remove="yes"
 
   testRepo=$(mktemp -d -t scm_breeze.XXXXXXXXXX)
+  testRepo=`cd $testRepo && pwd -P`
 }
 
 oneTimeTearDown() {