clixon_proc cann't start new process with PATH env

[nowaits]

Hi olof,
Currently clixon_proc cann't start a process whose executable filename does not contain a slash (/) but in PATH dirs.
execv changed with execvp will allow clixon_proc use PATH env start new process.

clixon/lib/src/clixon_proc.c

Line 325 in 5af7ea9

if (execv(argv[0], argv) < 0) {

[olofhagsand]

Fixed by above patch, please review