[roll] Roll fuchsia [roll] Roll llvm-project/libc a3e8a93..2a26f0e (8 commits)

2a26f0e:https://llvm.googlesource.com/llvm-project/libc/+/2a26f0e176ac983a8b33d19cbe47fbe53a273dee [libc][RISC-V] Temporarily disable dirent (#207867)
c803491:https://llvm.googlesource.com/llvm-project/libc/+/c8034913ef98bf8278bb59d2b12fd64b9206bae4 [libc] Implement fdopendir (#206590)
4bd5939:https://llvm.googlesource.com/llvm-project/libc/+/4bd593988d833a466e0dfec9e82442c4b7cb74a3 [libc] Add Q length modifier to support float128 conversions in printf (#203077)
1b5deb8:https://llvm.googlesource.com/llvm-project/libc/+/1b5deb87ddcc4c769cf12a2ba56fbdcc0ea19777 [NFC] Fix "is is" typos (#206288)
0647e86:https://llvm.googlesource.com/llvm-project/libc/+/0647e86ec11b238b77b7c1f945e16d5565f15bea [libc][test] Remove internal linkage from ErrnoSetterMatcher helpers (NFC) (#207707)
72fc19a:https://llvm.googlesource.com/llvm-project/libc/+/72fc19acc55fdf18974fed47f820612f6812e53f [libc] Add struct ipv6_mreq and IPv6 socket options (#206448)
0814c60:https://llvm.googlesource.com/llvm-project/libc/+/0814c6055785b91d6590f4f5794a1793d07b43c6 [libc] Implement sockatmark (#205400)
2a9b7d4:https://llvm.googlesource.com/llvm-project/libc/+/2a9b7d4be6915d6a4d72511ee29e739e62373508 [libc] Add protocol family constants (#206911)

Original-Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1694938
Original-Original-Revision: 337b14e453473c8e54f82fbff6d71de79c21ebb1
GitOrigin-RevId: a814e723ecb5ba2b4a24d609a8bdcaf6b518b78e
Change-Id: Ie6261cf467fa13ce69bc820549677393d6263c28
Reviewed-on: https://fuchsia-review.googlesource.com/c/integration/+/1695699
Cr-Commit-Position: refs/heads/main@{#196246}