Fixed CPPUTEST test runner for other compilers. Now we will force to pass main(argc, argv) ourselves to CPPUTEST test suite - as should be done in embedded project

libraries/tests/utest/basic/basic.cpp

@@ -9,4 +9,5 @@ TEST(FirstTestGroup, FirstTest)
     /* These checks are here to make sure assertions outside test runs don't crash */
     CHECK(true);
     LONGS_EQUAL(1, 1);
-}
+    STRCMP_EQUAL("Mbed SDK!", "Mbed SDK!");
+}

libraries/tests/utest/testrunner/testrunner.cpp

@@ -14,6 +14,9 @@ int main(int ac, char** av)
 {
     unsigned failureCount = 0;
     {
+        // Some compilers may not pass ac, av so we need to supply them ourselves
+        int ac = 2;
+        char* av[] = {__FILE__, "-v"};
         failureCount = CommandLineTestRunner::RunAllTests(ac, av);
     }