Fixing ZF-6743: Quoting $PHP_BIN in zf.sh for cases where path to php has spaces in it

git-svn-id: http://framework.zend.com/svn/framework/standard/trunk@16770 44c647ce-9c0f-0410-b52a-842ac1e357ba

bin/zf.sh

@@ -41,4 +41,4 @@ else
     PHP_DIR="$(dirname "$SELF_LINK")"
 fi
 
-$PHP_BIN -d safe_mode=Off -f "$PHP_DIR/zf.php" -- $@
+"$PHP_BIN" -d safe_mode=Off -f "$PHP_DIR/zf.php" -- $@