aidl_parser_fuzzer: try add filename hint

In order to parse valid files, the fuzzer previously needed to have the
filename present in the input text twice. This constraint makes it
difficult to even find valid programs.

Future considerations:
- clear out old/existing corpus
- manually create "good" corpus entries for the fuzzer

Bug: 195473218
Test: aidl_parser_fuzzer
Change-Id: I56ee41469b5563cd7c1b927319d21a7856480515
1 file changed