add update script

develop/update_git.sh

+#!/bin/sh -x
+
+fatal()
+{
+    echo "$@" >&2
+    exit 1
+}
+
+MV="$1"
+[ -n "$MV" ] || fatal
+
+ELIST="etersoft-common etersoft-share-flags etersoft-wine"
+
+cd ../../cifs-2.6 || fatal
+
+for i in $ELIST ; do
+    git checkout $i || fatal
+    git merge $MV || fatal
+done
+
+# create branch from tag
+git checkout -b $MV-etercifs $MV || fatal
+
+for i in $ELIST ; do
+    git merge $i || fatal
+done