Add build step to run layout tests for multiple iterations in guard malloc mode. Similar to https://bugs.webkit.org/show_bug.cgi?id=223950, but with guard-malloc.
Created attachment 424776 [details] Patch
Committed r275287: <https://commits.webkit.org/r275287> All reviewed patches have been landed. Closing bug and clearing flags on attachment 424776 [details].
<rdar://problem/76058363>