Disable LZ4HC compressed images

Seem to get randomly compressed incorrectly on volantis. Added
verifiation in the image writer.

Using LZ4HC now silently uses LZ4. This is still safe since both use
the same decompression code.

Bug: 27560444

(cherry picked from commit 9894fc80)

Change-Id: Ic0d78f419884d7ef2e29948835c942fbb68e66da