Patch merged into coreboot/master: 87200e2 Makefile.inc: Use -Og when compiling with GDB support

the following patch was just integrated into master:
commit 87200e2aa327bb53b7594e058aa42f7aba693109
Author: Stefan Reinauer 
Date:   Sun Mar 15 00:21:17 2015 +0100

Makefile.inc: Use -Og when compiling with GDB support

From GCC's documentation:

Optimize debugging experience. -Og enables optimizations that do not interfere
    with debugging. It should be the optimization level of choice for the standard
    edit-compile-debug cycle, offering a reasonable level of optimization while
    maintaining fast compilation and a good debugging experience.

Change-Id: I9a3dadbf8e894cb28e29d7b2f4e9add252e7bbb3
    Signed-off-by: Stefan Reinauer 
    Signed-off-by: Scott Duplichan 
    Reviewed-on: http://review.coreboot.org/8689
    Tested-by: build bot (Jenkins)
    Reviewed-by: Patrick Georgi

See http://review.coreboot.org/8689 for details.

-gerrit