build: Fix toolchain files
- Remove cross-compile 32b support (not working)
- clang: use clang system headers
Change-Id: If1da8ff9d01e2070ff99fc7f61a2625f75077cbd Signed-off-by: Mauricio Briceno mauricio.briceno@arm.com
Change-Id: If1da8ff9d01e2070ff99fc7f61a2625f75077cbd Signed-off-by: Mauricio Briceno mauricio.briceno@arm.com