Add more tests for extern "C" + multiline prototype generation

Author: facchinm

Diff for: src/arduino.cc/builder/test/sketch_with_externC_multiline/sketch_with_externC_multiline.ino

@@ -6,6 +6,14 @@ void setup() {
 void loop() {
   // put your main code here, to run repeatedly:
   test2();
+  test3();
+  test4();
+  test5(1,2,3);
+  test6();
+  test7();
+  test8();
+  test9(4,5);
+  test10();
 }
 
 void 
@@ -14,3 +22,46 @@ test() {}
 extern "C" {
 	void test2() {}
 }
+
+void 
+// comment
+test3() {}
+
+extern "C" 
+{
+	void test4() {}
+}
+
+void
+test5(int a,
+	  int b,
+	  int c)
+{
+
+}
+
+extern    "C"    
+
+{
+	void test6() {}
+}
+
+void /* comment */
+test7() {}
+
+void 
+/* 
+multi 
+line 
+comment 
+*/
+test8() {}
+
+extern    "C"     void test10() {
+	
+};
+
+void 
+/* comment */
+test9(int a, 
+	  int b) {}