tree eb28f23fb6b5bdc87ab996639ff9f75b36ee6a17
parent 5c57faaaca6b6f10647b46cf291546501a1aa837
author Arman Uguray <armansito@google.com> 1432240758 -0700
committer Arman Uguray <armansito@google.com> 1432677408 -0700

build: Add build arguments for libhardware and core dirs

This patch adds GN arguments to add libhardware and core library include
paths in a generic manner.

Example args.gn file:

    libhw_include_path = "../../libhardware/include"
    core_include_path = "../../core/include"

Also introduced in this CL is the "OS_GENERIC" preprocessor define, that
will allow us to conditionally compile Android-specific vs generic code
until we shed the Android-specific dependencies.

BUG=21339022

Change-Id: I42b1cc501738653a6e886a0365c9cbef2e9a525e