Bumped DEX format version to 040.

Version bump is needed after allowing spaces in SimpleName. DX itself
does not do any serious name validation, so no changes needed there.

Disabled test 127-merge-stress as it is nondeterministic and hangs.

Bug: 137432016
Bug: 140176236
Test: ran dalvik/dx/tests/run-all-tests
Change-Id: I8e10c17e1f464372609ab9c73184c231a85507cf
2 files changed