Make btest-bg-wait more responsive

Sleep 10 msec instead of 1 second to check for process termination to
make detecting process termination a bit more timely.

Author: awelzel

btest-bg-wait

@@ -25,7 +25,7 @@ if [ $# != 1 ]; then
     exit 1
 fi
 
-timeout=$1
+timeout=$(($1 * 100))
 
 procs=$(cat .bgprocs)
 
@@ -122,7 +122,7 @@ while true; do
         exit 1
     fi
 
-    sleep 1
+    sleep 0.01
 done
 
 trap - EXIT