Also fixed flatc not outputting these identifiers for files
compiled on the command-line.
Bug: 16983987
Change-Id: I8b714cfea3a8e144fa52133f62b2f7eda6eb044a
Tested: on Linux
When Parsing JSON, it will read enums either as int values, identifiers
specific to the enum type, or strings containing those identifiers.
When generating text, it will output enum identifiers by default
(this can be turned off in favor of integers, like before).
Change-Id: If28b0a1f8f27de79aff3e626f40c0c0b271c325a
Tested: on Windows and Linux
Bug: 16214968
