Scripts: Fix branch detection with git older than 1.7.10

scripts/commit_all_submodules

@@ -6,7 +6,7 @@ if [[ ! -e .git ]] ||
 	exit 1
 fi
 
-branch=`git symbolic-ref --short -q HEAD`
+branch=`git symbolic-ref -q HEAD | sed "s|^refs/heads/||"`
 if [[ -z "$branch" ]] ||
    [[ -z "`git rev-parse --symbolic-full-name --remotes=\"*/$branch\"`" ]]; then
 	echo "There is not active upstream branch.  Exiting..."

scripts/switch_all_submodules_to_head_and_clean

@@ -6,7 +6,7 @@ if [[ ! -e .git ]] ||
 	exit 1
 fi
 
-branch=`git symbolic-ref --short -q HEAD`
+branch=`git symbolic-ref -q HEAD | sed "s|^refs/heads/||"`
 if [[ -z "$branch" ]] ||
    [[ -z "`git rev-parse --symbolic-full-name --remotes=\"*/$branch\"`" ]]; then
 	echo "There is not active upstream branch.  Exiting..."

scripts/update_all_submodules

@@ -12,7 +12,7 @@ if [[ ! -e .git ]] ||
 	exit 1
 fi
 
-branch=`git symbolic-ref --short -q HEAD`
+branch=`git symbolic-ref -q HEAD | sed "s|^refs/heads/||"`
 if [[ -z "$branch" ]] ||
    [[ -z "`git rev-parse --symbolic-full-name --remotes=\"*/$branch\"`" ]]; then
 	echo "There is not active upstream branch.  Exiting..."