Clean up logcat spam from compiler and verifier

Moved to VLOG(...), adding verifer tag for VLOG.

Change-Id: Ia9ac8aeaf5aa1f4881e384003e82a66e560c5692
diff --git a/compiler/driver/compiler_driver.cc b/compiler/driver/compiler_driver.cc
index 144271d..47ef222 100644
--- a/compiler/driver/compiler_driver.cc
+++ b/compiler/driver/compiler_driver.cc
@@ -64,7 +64,7 @@
   if (x == 0 && y == 0) {
     return;
   }
-  LOG(INFO) << Percentage(x, y) << "% of " << str << " for " << (x + y) << " cases";
+  VLOG(compiler) << Percentage(x, y) << "% of " << str << " for " << (x + y) << " cases";
 }
 
 class AOTCompilationStats {
@@ -724,7 +724,7 @@
     std::pair<CompilerDriver::DescriptorSet::iterator, bool> result =
         image_classes->insert(descriptor);
     if (result.second) {
-      LOG(INFO) << "Adding " << descriptor << " to image classes";
+        VLOG(compiler) << "Adding " << descriptor << " to image classes";
     } else {
       return;
     }
@@ -2070,7 +2070,7 @@
             }
           }
           if (!is_black_listed) {
-            LOG(INFO) << "Initializing: " << descriptor;
+            VLOG(compiler) << "Initializing: " << descriptor;
             if (StringPiece(descriptor) == "Ljava/lang/Void;") {
               // Hand initialize j.l.Void to avoid Dex file operations in un-started runtime.
               mirror::ObjectArray<mirror::Field>* fields = klass->GetSFields();