[wrt]update manifest script file

[Detailed commit message (if have)]
Impacted TCs num(approved): New 0, update 264, deleted 0
Unit test platform: [tizen]
Test Result: Pass 264, Fail 0
BUILD_ID=tizen-ivi_20141022.3_ivi-mbr-i586
crosswalk-10.38.222.0-19.5.i686
tizen-extensions-crosswalk-0.107-18.2.i686
please confirm the command used here with the latest inst.wgt.py