add native bool support

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@8345 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/test-suite/overload_simple.i

@@ -108,6 +108,14 @@ static char *bar(void *) {
 };
 
 
+bool fbool(bool b) {
+   return b;
+}
+
+int fbool(int b) {
+   return b;
+}
+
 char *fint(int) {
    return (char*) "fint:int";
 }