[roll] Roll fuchsia [roll] Roll llvm-project/libc fc09e17..791fb84 (7 commits)

791fb84:https://llvm.googlesource.com/llvm-project/libc/+/791fb84bc5591f2cd099cc5c367aa333f0bdd764 [libc] prefer *at syscalls in sys/stat wrappers (#197940)
c6d0d3f:https://llvm.googlesource.com/llvm-project/libc/+/c6d0d3fd8df18212ae108fd6ee6bb49309d2899f [libc] Port remaining socket functions to syscall_wrappers (#198463)
ebd3b0e:https://llvm.googlesource.com/llvm-project/libc/+/ebd3b0ee2ccb2c1846ecbbfaca7e0a300d4e4fb8 Fix unused parameter for add_bitcode_entrypoint_library for GPU Libc (#198458)
4f0c62b:https://llvm.googlesource.com/llvm-project/libc/+/4f0c62b3f2a950faac135c6aa2169b9082a52765 [libc] Add struct sockaddr_in (#197909)
c64907a:https://llvm.googlesource.com/llvm-project/libc/+/c64907a52f265ebf453f5aa77094189ee4f23061 [libc][cmake] Don't assume CPU features in cross builds (#198308)
da14d28:https://llvm.googlesource.com/llvm-project/libc/+/da14d2885301da0c388c6f2eca25d1c586fdf209 [libc] Add regex_macros dependency to regex header (#198453)
310fe6e:https://llvm.googlesource.com/llvm-project/libc/+/310fe6e53ccb29f78290d1ad5fe6a6070c8e58a5 [libc] Migrate socket syscall wrappers to syscall_checked (#198241)

Original-Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1618268
Original-Original-Revision: 0de77b428b54898b195868358b675d6aedc213fa
GitOrigin-RevId: 0e620a61964f536a6d4be0121f8858caf09ef444
Change-Id: I4a55ae12ae413d6b3f7b7bc16fde440dfa31daf5
Reviewed-on: https://fuchsia-review.googlesource.com/c/integration/+/1618457
Cr-Commit-Position: refs/heads/main@{#193010}