boardconfig: build as krait

-scorpion CPU variant is missing; try krait.

Change-Id: I135a780c2a5e0c225d91c71f4bcfe558ca9128ac
shbootimg: Fix ups

-new symbols path

-explicitly add uncompressed recovery ramdisk

Change-Id: I42bf856e629a572391c70a718776267f6f848f8d