fold SK_CPU_HAS_CONDITION_INSTR through as always defined

BUG=
R=reed@google.com

Author: mtklein@google.com

Review URL: https://chromiumcodereview.appspot.com/21122005

git-svn-id: http://skia.googlecode.com/svn/trunk@10432 2bbb7eff-a529-9590-31e7-b0007b416f81
7 files changed