util: check for process_vm_readv in C library

glibc-2.15 provides process_vm_readv, so trying to provide it ourselves
with that version fails.

* configure.ac (AC_CHECK_FUNCS): Add process_vm_readv.
* util.c: Handle HAVE_PROCESS_VM_READV.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2 files changed