add extended option to Test

The command line option
--extended runs extended tests
--verbose reports number of tests run (if recorded)

Added simple help as well.
Review URL: https://codereview.chromium.org/14063005

git-svn-id: http://skia.googlecode.com/svn/trunk@8595 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/Test.cpp b/tests/Test.cpp
index e0b997a..79d3aad 100644
--- a/tests/Test.cpp
+++ b/tests/Test.cpp
@@ -20,7 +20,8 @@
 
 using namespace skiatest;
 
-Reporter::Reporter() {
+Reporter::Reporter()
+    : fTestCount(0) {
     this->resetReporting();
 }