added: ability to specify the number of threads used for make check-commits(-all)

use CHECK_THREADS=n

git-svn-id: http://svn.sintef.no/trondheim/IFEM/trunk@2016 e10b68d5-8a6e-419e-a041-bce267b0401d

scripts/doregtests.sh

@@ -35,7 +35,9 @@ Build() {
     cd $1
     cmake $3
   fi
-  if ! make -j3
+  threads=$CHECK_THREADS
+  test -z $thread && threads=3
+  if ! make -j$threads
   then
     globres=1
     return