musl: Update to latest master

Refresh patches to apply to this update

Brings in following fixes

* 1e4204d5 use libc-internal malloc for newlocale/freelocale
* 36246b34 drop use of pthread_once in newlocale
* 37fcc13c lift locale lock out of internal __get_locale
* c53e9b23 fix misleading comment in strstr
* b67d56c7 drop use of pthread_once for aio thread stack size init
* 90ff0169 fix omission of non-stub pthread_mutexattr_getprotocol
* 56f0631d riscv64: fix inconsistent ucontext_t struct tag
* 50c7935c fix failure to preserve r6 in s390x asm; per ABI it is call-saved
* 738c4e94 s390x: derive float_t from compiler or default to float
* 821083ac implement reallocarray
* 29ff7599 implement realpath directly instead of using procfs readlink
* 5d464f52 fix mallocng regression in malloc_usable_size with null argument
* d046ec92 configure: do not use obsolescent form of test -a|o
* c5d118eb fix segfault in lutimes when tv argument is NULL
* 67f77462 netinet/in.h: add IP_RECVERR_4884 from linux v5.9
* d078f836 sys/fanotify.h: add new FAN_* macros from linux v5.9
* 3ba370fe bits/syscall.h: add __NR_close_range from linux v5.9
* badc5bb2 add missing personality values
* 6e989248 arm fabs and sqrt: support single-precision-only fpu variants
* c8c3e341 fix typo in INSTALL
* e2fa720b work around linux bug in readlink syscall with zero buffer size
* c17cda6d parse v3 or future-unknown zoneinfo file versions as v2+
* 585a0a78 explicitly prefer 64-bit/v2 zoneinfo tables
* debbddf7 fix regression in pthread_exit
* 3ab2a4e0 rewrite wcsnrtombs to fix buffer overflow and other bugs
* 233bb697 protect destruction of process-shared mutexes against robust list races
* d26e0774 pthread_exit: don't __vm_wait under thread list lock
* 167390f0 lift child restrictions after multi-threaded fork
* 34952fe5 convert malloc use under libc-internal locks to use internal allocator
* 8d37958d give libc access to its own malloc even if public malloc is interposed
* c1e5d243 drop use of getdelim/stdio in dynamic linker
* cbecda0b dlerror: don't gratuitously hold freebuf_queue lock while freeing
* 4ffa7068 fix vector types in aarch64 register file structures

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>