The bitcode parser assumes that the module symbol table, if it exists, must appear before the first function block (i.e. defininition). However, the parser did not check this constraint. This patch fixes that omission. BUG= https://code.google.com/p/nativeclient/issues/detail?id=4320 R=stichnot@chromium.org Review URL: https://codereview.chromium.org/1359923002 .
