Refactor the libbcc runtime for x86 platform

This patch is merged/rebased from AOSP, where it was initially submitted to
frameworks/compile/libbcc by Jun Tian <jun.j.tian@intel.com>. All conflicts
have been resolved.

This patch refactors the libbcc runtime code to support x86 platform.
It removed the redundant x86 code and added the missing functions in
libclcore_x86.bc.
It resolved the RenderScript failures on the x86 platform.

Bug: 9961583
Change-Id: I2c8be0f710960ee5e0614721f5edfbaf028c67e1
10 files changed