cc files are also fine to compile

Author: timfel

graalpython/com.oracle.graal.python.shell/src/com/oracle/graal/python/shell/GraalPythonCC.java

@@ -167,7 +167,7 @@ private void parseOptions(String[] args) {
                             throw new RuntimeException("cannot mix source and compiled sources");
                         }
                         fileInputs.add(arg);
-                    } else if (arg.endsWith(".c") || arg.endsWith(".cpp") || arg.endsWith(".cxx")) {
+                    } else if (arg.endsWith(".c") || arg.endsWith(".cc") || arg.endsWith(".cpp") || arg.endsWith(".cxx")) {
                         if (arg.endsWith(".cpp") || arg.endsWith(".cxx")) {
                             isCpp = true;
                         }