[Bug go/92567] libgo regression in syscall test on ppc64le resulting in timeout due to hang in read

[murphyp at linux dot vnet.ibm.com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92567

--- Comment #2 from Paul E. Murphy <murphyp at linux dot vnet.ibm.com> ---
For clarity, the prototype of ptrace from glibc:

extern long int ptrace (enum __ptrace_request __request, ...) __THROW;