skip ICPC test if icpc is not working

buildspec.yaml

@@ -9,7 +9,7 @@ phases:
     commands:
       - g++ --version
       - clang++ --version
-      - icpc --version
+      # - icpc --version # Intel CC on build machine expired...
   build:
     commands:
       - make

test/test.sh

 #!/bin/bash
 
-for cxx in g++ clang++ icpc
+if icpc --version; then
+    compilers=(g++ clang++ icpc)
+else
+    compilers=(g++ clang++)
+fi
+
+for cxx in $compilers
 do
     for std in 14 17
     do