Add test case for parsing endobj keywords.

There is no assurance that the expected result files are consistent
with other readers.  Jun will have to verify that after making his
parser changes for bug 493126.

BUG=493126
R=thestig@chromium.org, jun_fang@foxitsoftware.com

Review URL: https://codereview.chromium.org/1232803005 .
39 files changed