uClibc lacks process_vm_readv(), and sudo fails to build since commit
c87746afef (package/sudo: security bump to version 1.9.15p5), with
errors such as:
./exec_ptrace.c: In function ‘ptrace_write_vec’:
./exec_ptrace.c:895:9: error: ‘nwritten’ undeclared (first use in this function); did you mean ‘pwrite’?
895 | nwritten = ptrace_write_string(pid, strtab, vec[i]);
| ^~~~~~~~
| pwrite
Backport an upstream commit to fix the issue.
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>