Use command line arguments to test only for specific compilers.

tests/c++-compiler/test.sh

@@ -39,6 +39,10 @@ swap_env() {
     module swap $currentPrgEnv PrgEnv-$newPrgEnv
 }
 
+if [ ! -z $1 ] ; then
+    compilers=$@
+fi
+
 for compiler in $compilers; do
     for version in $(module av $compiler -l 2>&1 | awk "/^$compiler\//{print \$1}" | awk -F'/' '{print $2}'); do 
         logfile="$compiler-$version.log"