generic_x86 support

Add in Makefiles and support files for x86 builds
  Based on changes by: wonjong.lee <wonjong.lee@windriver.com>
  Additional changes by: Mark Gross <mark.gross@intel.com>
  Additional changes by: Bruce Beare <brucex.j.beare@intel.com>

Change-Id: Id087411b282b1b68a0251e7f9cbbdde183549787
Signed-off-by: Bruce Beare <brucex.j.beare@intel.com>