scripts: sync-fragment: use "mv" instread of "cp"

Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
Change-Id: I91365eb455ff4b79253a8666571c42847d96090e

scripts/sync-fragment.sh

@@ -45,7 +45,7 @@ fi
 cp .config fragment.config
 make ${BASE_DEFCONFIG0} ${BASE_DEFCONFIG1}
 ./scripts/diffconfig -m .config fragment.config | sort > ${FRAGMENT_CONFIG}
-cp fragment.config .config
+mv fragment.config .config
 
 echo "$MSG_NEW_FILE"
 echo "Sync ${FRAGMENT_CONFIG} ... OK."