Patch merged into coreboot/master: toolchain.inc: Update help text, Add TODO.

the following patch was just integrated into master:
commit ada36d4cff54c419479a7865278108d2ae44bc6e
Author: Martin Roth 
Date:   Mon Dec 7 14:27:34 2015 -0700

toolchain.inc: Update help text, Add TODO.

- Update the help text to be more informative.
    - Add todo about IASL - we shouldn't require it if the build doesn't
    use it.

Change-Id: Iffeb94f78c1ae7535a8a7b9b0b9f1728301a42b3
    Signed-off-by: Martin Roth 
    Reviewed-on: https://review.coreboot.org/12680
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

See https://review.coreboot.org/12680 for details.

-gerrit