Patch merged into coreboot/master: ac12c66 assets: abstract away the firmware assets used for booting

the following patch was just integrated into master:
commit ac12c66cf91343153ea90a6f33977a13e10b21d0
Author: Aaron Durbin 
Date:   Wed May 20 12:08:55 2015 -0500

assets: abstract away the firmware assets used for booting

As there can be more than one source of firmware assets this
    patch generalizes the notion of locating a particular asset.
    struct asset is added along with some helper functions for
    working on assets as a first class citizen.

Change-Id: I2ce575d1e5259aed4c34c3dcfd438abe9db1d7b9
    Signed-off-by: Aaron Durbin 
    Reviewed-on: http://review.coreboot.org/10264
    Reviewed-by: Patrick Georgi 
    Tested-by: build bot (Jenkins)

See http://review.coreboot.org/10264 for details.

-gerrit