Patch merged into coreboot/master: f8f7773 libpayload arm64: Add gdb stub for arm64

the following patch was just integrated into master:
commit f8f77731d93b23a1e86ee27341958f663335835a
Author: Furquan Shaikh 
Date:   Fri Jun 20 00:19:31 2014 -0700

libpayload arm64: Add gdb stub for arm64

Add stub implementation for gdb arm64 support. Currently all functions are kept
    empty to enable proper compilation of depthcharge and libpayload. As we get more
    clear about context management and stuff, we can add details for gdb as well.

BUG=None
    BRANCH=None
    TEST=Compiles successfully for rush

Original-Change-Id: I0a8729671ab0764d424c0e3d50af86433d05b1e8
    Original-Signed-off-by: Furquan Shaikh 
    Original-Reviewed-on: https://chromium-review.googlesource.com/204877
    Original-Tested-by: Furquan Shaikh 
    Original-Reviewed-by: Aaron Durbin 
    Original-Commit-Queue: Furquan Shaikh 
    (cherry picked from commit d24e5c26b56a9882b3450b1e4988b56c3d73efd1)
    Signed-off-by: Marc Jones

Change-Id: I9b7d3d7060dd827ef4a46865e0f9a2b4e063d07d
    Reviewed-on: http://review.coreboot.org/8125
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

See http://review.coreboot.org/8125 for details.

-gerrit