Add PE64 support to courgette

Add tests for PE64

BUG=38784

Review URL: https://chromiumcodereview.appspot.com/23600063

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224789 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 224789