Add support for Linux/no-mmu with vfork

* configure.ac (AC_CHECK_FUNCS): Add fork.
* strace.c (strace_vforked): Define.
(startup_child): Do not raise SIGSTOP if vforked.
(trace): Skip first exec when starting up after vforked.
* syscall.c [BFIN] (get_scno): Drop waitexec checks.

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