[wrt]update xwalkctl to pkgcmd

Impacted TCs num(approved): New 0, update 24, deleted 0
Unit test platform: [tizen]
Test Result:
wrt-packagemgt-tizen-tests: pass 8, fail 0 ,block 7
wrt-digitalsign-tizen-tests:pass 1, fail 0 ,block 1
wrt-packertool-tizen-tests: pass 3, fail 0 ,block 0
wrt-rtbin-tizen-tests: pass 4, fail 0 ,block 0
wrt-manifest-tizen-tests: all fail, can not launch the webapp 
Crosswalk:crosswalk-10.38.225.0-0.i686