RFR: 8277398: javac does not accept encoding name COMPAT [v2]

[Ichiroh Takiguchi]

> ncoding name COMPAT was defined for operating system encoding by JEP-400.
> https://openjdk.java.net/jeps/400
> But java does not accept "-encoding COMPAT".

Ichiroh Takiguchi has updated the pull request incrementally with one additional commit since the last revision:

  8277398: javac does not accept encoding name COMPAT

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6475/files
  - new: https://git.openjdk.java.net/jdk/pull/6475/files/a1b329e2..94d0c2c7

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6475&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6475&range=00-01

  Stats: 192 lines in 6 files changed: 83 ins; 106 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6475.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6475/head:pull/6475

PR: https://git.openjdk.java.net/jdk/pull/6475