Merge pull request #22049 from alexrp/musl-gen-stubs

`gen_stubs`: No compiler-rt hacks, more compact output, and more arch support

Author: andrewrk

lib/libc/musl/arch/i386/crt_arch.h

@@ -3,6 +3,7 @@ __asm__(
 ".weak _DYNAMIC \n"
 ".hidden _DYNAMIC \n"
 ".global " START "\n"
+".type " START ",%function \n"
 START ":\n"
 "	xor %ebp,%ebp \n"
 "	mov %esp,%eax \n"

lib/libc/musl/arch/x86_64/crt_arch.h

@@ -1,6 +1,7 @@
 __asm__(
 ".text \n"
 ".global " START " \n"
+".type " START ",%function \n"
 START ": \n"
 "	xor %rbp,%rbp \n"
 "	mov %rsp,%rdi \n"