Restore TEST_MAPPING files removed during repackaging

Running a script like external/conscrypt/srcgen/
removed the TEST_MAPPING files. This change restores them by checking
them out of git. This does mean that if a TEST_MAPPING file has been
edited that the changes will be lost.

Test: external/conscrypt/srcgen/
Change-Id: Ifedff3823f14a7a098a677709bf1ce89b5a8c22d
1 file changed
tree: f8c2c62094e102fa8e3922e1702a31fc35e0dcfb
  2. scripts/