Frameworks/base: Ignore unknown pragmas in core/jni

Preparation for a switch to Clang.

Change-Id: Iabe1d79474a617bec66dd4bf58002b1a372f6d23
Merge "Frameworks/base: Ignore unknown pragmas in core/jni"
Frameworks/base: Compiled-classes support

Let AndroidRuntime check for /system/etc/compiled-classes and push
it to the runtime for boot image creation.

Bug: 18410571

(cherry picked from commit ca775941f3b7981aabf3a6a3b84d6c94f4f76aff)

Change-Id: I2510316381f2661166af24d7e14b013f4e045556
Merge "Frameworks/base: Compiled-classes support"