make pthread attribute types structs, even when they just have one field
[musl] / arch / arm /
drwxr-xr-x   ..
-rw-r--r-- 1989 atomic.h
drwxr-xr-x - bits
-rw-r--r-- 267 pthread_arch.h
-rw-r--r-- 1147 reloc.h
drwxr-xr-x - src
-rw-r--r-- 2159 syscall_arch.h