Change in coreboot[master]: clang: Enable integrated assembler on clang builds

[build bot (Jenkins) (Code Review)]

build bot (Jenkins) has posted comments on this change. ( https://review.coreboot.org/21221 )

Change subject: clang: Enable integrated assembler on clang builds
......................................................................

Patch Set 4:

Build Successful

https://qa.coreboot.org/job/coreboot-checkpatch/14913/ : SUCCESS

https://qa.coreboot.org/job/coreboot-gerrit/59632/ : SUCCESS