Android build fix
Merge pull request #1032 from raven02/patch-6

Android build fix
Optimize thread ready queue pop_front().
Small optimization to sceKernelRotateThreadReadyQueue().
Allow the thread ready queue to shrink, simplify.
Merge pull request #1033 from unknownbrackets/perf

Improve thread switching performance
Revert thread optimization, appears to have broken things.

Fixes #1033.

This reverts commit ea91632ff5539b356f62bc2c97f3b90290ede703 and
commit 543dfcd4d80c93f311c36bc2f0d98757ddd476d5.
Fix dumb typo in sceKernelRotateThreadReadyQueue().
Merge remote-tracking branch 'upstream/master' into fps2