Merge tag 'pull-hex-20251017' of https://github.com/quic/qemu into staging

Fixes for linux-user sigcontext save/restore, etc.

misc: avoid inconsistencies w/indent on macOS
fix hexagon linux-user sigcontext discrepancy, found by Alex @ Zig

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# gpg: Signature made Fri 17 Oct 2025 01:47:42 PM PDT
# gpg:                using RSA key 3D66AAE474594824C88CE0F81A54AFB8E5646C32
# gpg: Good signature from "Brian Cain (QUIC) <quic_bcain@quicinc.com>" [unknown]
# gpg:                 aka "Brian Cain <bcain@kernel.org>" [unknown]
# gpg:                 aka "Brian Cain (QuIC) <bcain@quicinc.com>" [unknown]
# gpg:                 aka "Brian Cain (CAF) <bcain@codeaurora.org>" [unknown]
# gpg:                 aka "bcain" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 6350 20F9 67A7 7164 79EF  49E0 175C 464E 541B 6D47
#      Subkey fingerprint: 3D66 AAE4 7459 4824 C88C  E0F8 1A54 AFB8 E564 6C32

* tag 'pull-hex-20251017' of https://github.com/quic/qemu:
  target/hexagon: Only indent on linux
  target/hexagon: Replace `prepare` script with meson target
  target/hexagon: s/pkt_has_store/pkt_has_scalar_store
  target/hexagon: handle .new values
  tests/tcg/hexagon: Add cs{0,1} coverage
  linux-user/hexagon: Use an array for GPRs
  linux-user/hexagon: use abi_ulong
  linux-user/hexagon: Fix sigcontext

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>