[coreboot] [PATCH]handle both oldstyle and newstyle lzma(1) utility

[Patrick Georgi]

The attached patch tries new style compression first and runs old style 
compression if the command returned an error code (happens if you run an 
old lzma with the new arguments)

Tested on new-style lzma only (as I lack a build environment with old 
lzma), but I tested that the old lzma returns with an error code.

Signed-off-by: Patrick Georgi