Don't clean up the .json-command files at the beginning of the script.
Don't clean up the .json-command files at the beginning of the script.

These files are generated during the compile step, so we would clean up
the new files :-(
Also use RemoveFilesWildcards for removing the archive files.

BUG=419340

Review URL: https://codereview.chromium.org/621923003

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@292279 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build