[coreboot] Patch merged into coreboot/master: fe18792 armv7: Add 'bootblock' build class.

the following patch was just integrated into master:
commit fe18792a0887b5ba1ce8e0c8f9f6f1911395552a
Author: Hung-Te Lin 
Date:   Fri Feb 1 01:09:24 2013 +0800

armv7: Add 'bootblock' build class.

For ARM platform, the bootblock may need more C source files to initialize
    UART / SPI for loading romstage. To preventing making complex and implicit
    dependency by using #include inside bootblock.c, we should add a new build class
    "bootblock".

Also #ifdef __BOOT_BLOCK__ can be used to detect if the source is being compiled
    for boot block.

For x86, the bootblock is limited to fewer assembly files so it's not using this
    class. (Some files shared by x86 and arm in top level or lib are also changed
    but nothing should be changed in x86 build process.)

Change-Id: Ia81bccc366d2082397d133d9245f7ecb33b8bc8b
    Signed-off-by: Hung-Te Lin 
    Reviewed-on: http://review.coreboot.org/2252
    Reviewed-by: Ronald G. Minnich 
    Tested-by: build bot (Jenkins)

Build-Tested: build bot (Jenkins) at Sun Feb  3 05:40:28 2013, giving +1
Reviewed-By: Ronald G. Minnich  at Sun Feb  3 05:35:28 2013, giving +2
See http://review.coreboot.org/2252 for details.

-gerrit