pgrep: use sigqueue to pass value with the signal.

Based on the command line option, use 'sigqueue'
instead of 'kill' to pass the integer value with
the signal.
1 job for newlib in 2 minutes and 53 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Test
failed #6429387
MakeCheck

00:02:53

 
Name Stage Failure
failed
MakeCheck Test There is an unknown failure, please try again
make[2]: *** [check-am] Error 2
Makefile:582: recipe for target 'check-am' failed
make[2]: Leaving directory '/builds/carun/procps/testsuite'
Makefile:1750: recipe for target 'check-recursive' failed
make[1]: Leaving directory '/builds/carun/procps'
make[1]: *** [check-recursive] Error 1
Makefile:2241: recipe for target 'check' failed
make: *** [check] Error 2
ERROR: Build failed: exit code 1