Patch merged into coreboot/master: Makefile.inc: Add build targets for IASL & Clang

the following patch was just integrated into master:
commit 4eea174695564f9bef4da5157c0e1684cb3ae7af
Author: Martin Roth 
Date:   Wed Nov 25 11:50:04 2015 -0700

Makefile.inc: Add build targets for IASL & Clang

- Add specific build targets for IASL & CLANG and help for those targets
    - Consolidate tool target .PHONY entries

Change-Id: If2960d75310495d9e486b3a08808463a2ff0c644
    Signed-off-by: Martin Roth 
    Reviewed-on: https://review.coreboot.org/12541
    Tested-by: build bot (Jenkins)
    Reviewed-by: Patrick Georgi

See https://review.coreboot.org/12541 for details.

-gerrit