1. Incorrect usage help of TianoCompress tool
2. Wrong check for the input parameters of GenVtf tool.
3. The potential issues to get FFS files in GenFv tool.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@8379 6f19259b-4bc3-4df7-8a09-765794883524