Add test for multi-line prototype

Author: focalintent

src/arduino.cc/builder/test/sketch_with_multiline_prototypes/sketch_with_multiline_prototypes.ino

@@ -0,0 +1,9 @@
+void setup() { myctagstestfunc(1,2,3,4); }
+
+void myctagstestfunc(int a,
+int b,
+int c,
+int d) { }
+
+void loop() {}
+

src/arduino.cc/builder/test/try_build_of_problematic_sketch_test.go

@@ -195,6 +195,10 @@ func TestTryBuild037(t *testing.T) {
 	tryBuild(t, "sketch_with_externC", "sketch_with_externC.ino")
 }
 
+func TestTryBuild038(t *testing.T) {
+	tryBuild(t, "sketch_with_multiline_prototypes", "sketch_with_multiline_prototypes.ino")
+}
+
 func makeDefaultContext(t *testing.T) map[string]interface{} {
 	DownloadCoresAndToolsAndLibraries(t)