It's broken because of the missing implementation of patchableBranch8(). Fro ARMV7 it was added by Mark in https://trac.webkit.org/r235557, but the implementation for traditional ARM is still missing.
Created attachment 350359 [details] Patch
Comment on attachment 350359 [details] Patch r=me as a build fix.
Comment on attachment 350359 [details] Patch Clearing flags on attachment: 350359 Committed r236315: <https://trac.webkit.org/changeset/236315>
All reviewed patches have been landed. Closing bug.
<rdar://problem/44679245>