Parse runtime compiler options for JIT

For the case where the CppDefines do not match the device the JIT is
running on.

Sample logcat output to prove it works:
JIT instruction set variant krait
JIT instruction set features default

Bug: 24982714

(cherry picked from commit 085fc87e7ea42989a4a00cacb0c9c3a6d2590af6)

Change-Id: I1f4991a5d7cdc6101d1b0ecbcb39fb26dd20180a
1 file changed