musl: Update to tip of trunk

musl: Update to tip of trunk

Brings following fixes

* 8fd5d031 aarch64: mask off SME and unknown/future hwcap bits
* 709fee55 aarch64: replace asm source file for __set_thread_area with inline asm
* bd981f33 elf.h: add AT_HWCAP3 and AT_HWCAP4
* f96e47a2 printf: fix regression in large double formatting on ld128 archs
* caae5a8b fix register name usage in aarch64 clone.s
* ab4635fb make __getauxval a public ABI symbol
* fcdff46a statx: add Linux 6.11 fields/constants
* 18289e5d ldso: fix typo in comment
* 86373b49 powerpc: update HWCAP bits for Power10
* fde29c04 stdio: skip empty iovec when buffering is disabled

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>