musl: Update to latest master

brings following fixes

* 6d8a5157 fix invalid free of duplocale object when malloc has been replaced
* 760f5d7e fix __WORDSIZE on x32 sys/user.h
* bdb54540 sys/ptrace.h: add PTRACE_GET_RSEQ_CONFIGURATION from linux v5.13
* aa3bab6c sys/prctl.h: add PR_PAC_{SET,GET}_ENABLED_KEYS from linux v5.13
* a8300f5d elf.h: add NT_ARM_PAC_ENABLED_KEYS from linux v5.13
* dda21f10 netinet/in.h: add INADDR_DUMMY from linux v5.13
* ee05b11b bits/syscall.h: add landlock syscalls from linux v5.13
* 1ee8109e netinet/tcp.h: add tcp_zerocopy_receive fields from linux v5.12
* bc89c311 netinet/tcp.h: add TCP_NLA_* values up to linux v5.12
* 9ffd1454 s390x: add ptrace requests from linux v5.12
* f7d3db5b bits/syscall.h: add mount_setattr from linux v5.12
* e99c4258 signal.h: add new sa_flags from linux v5.11
* 993cccce signal.h: add SYS_USER_DISPATCH si_code value from linux v5.11
* 3dcbd896 signal.h: add si_code values for SIGSYS
* 30c8a145 netinet/tcp.h: add tcp zerocopy related changes from linux v5.11
* b54f481f netinet/if_ether.h: add ETH_P_CFM from linux v5.11
* c5ecaca7 sys/socket.h: add new SO_ socket options from linux v5.11
* f35b99b3 sys/prctl.h: add PR_SET_SYSCALL_USER_DISPATCH from linux v5.11
* b21f3ded bits/syscall.h: add epoll_pwait2 from linux v5.11
* 3aba2150 nice: return EPERM instead of EACCES
* 74a28a8a protect stack canary from leak via read-as-string by zeroing second byte
* 7c0c7a75 math: avoid runtime conversions of floating-point constants

(From OE-Core rev: 56c0629caebd7f22a09925333c2dc800901d7794)

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

meta/recipes-core/musl/musl_git.bb

@@ -4,7 +4,7 @@
 require musl.inc
 inherit linuxloader
 
-SRCREV = "f8bdc3048216f41eaaf655524fa286cfb1184a70"
+SRCREV = "6d8a515796270eb6cec8a278cb353a078a10f09a"
 
 BASEVER = "1.2.2"