dump out sizeof(void*) in header

BUG=
R=rmistry@google.com

Review URL: https://codereview.chromium.org/23773003

git-svn-id: http://skia.googlecode.com/svn/trunk@11012 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/skia_test.cpp b/tests/skia_test.cpp
index 7a8308f..a2f5e9c 100644
--- a/tests/skia_test.cpp
+++ b/tests/skia_test.cpp
@@ -196,6 +196,7 @@
 #else
         header.append(" SK_SCALAR_IS_FLOAT");
 #endif
+        header.appendf(" skia_arch_width=%d", (int)sizeof(void*) * 8);
         SkDebugf("%s\n", header.c_str());
     }