LLVM GN buildbot

linux pass, build 173657 (2025-07-18T16:45:24Z, took 0:06:39)
    0c75e093813c
macm1 pass, build 110735 (2025-07-18T16:32:36Z, took 0:10:04)
    a9147e64aa75
win fail, build 98074 (2024-11-16T02:48:54Z, took 0:06:29)
    failing step: building
    last good build 95739 (2024-10-21T21:43:12Z, took 0:09:52)
    regression range: 9b7be3ebe5c1...3793decaaaf8
    309c890921b8