Updated the revision header with git revision

build-scripts/showrev.sh

@@ -5,9 +5,9 @@
 SDL_ROOT=$(dirname $0)/..
 cd $SDL_ROOT
 
-if [ -x "$(command -v hg)" ]; then
-    rev="$(hg parents --template 'hg-{rev}:{node|short}' 2>/dev/null)"
-    if [ $? = 0 ]; then
+if [ -x "$(command -v git)" ]; then
+    rev=$(echo "$(git remote get-url origin 2>/dev/null)@$(git rev-list HEAD~.. 2>/dev/null)")
+    if [ "$rev" != "@" ]; then
         echo $rev
         exit 0
     fi
@@ -21,5 +21,5 @@ if [ -x "$(command -v p4)" ]; then
     fi
 fi
 
-echo "hg-0:baadf00d"
+echo ""
 exit 1