Mention OpenJDK7 may be used

Summary: OpenJDK7 works fine with the proper flag.

Test Plan: verified

Reviewers: randall.rushing, synergy

Reviewed By: synergy

Differential Revision: http://review.codefirex.com/D193
armv7-a-neon: cleanup and fix cpu variant detection

Summary:
Fixes armv5te defaults for anything other than cortex-a7, cortex-a9,
cortex-a15, or krait.

Test Plan: verify on grouper

Reviewers: randall.rushing, synergy

Reviewed By: synergy

Differential Revision: http://review.codefirex.com/D195