monitor: Update path to hprof-conv

From tools r22.3, hprof-conv is inside platform-tools, not tools.
I've filed https://code.google.com/p/android/issues/detail?id=72570
to make a better fix in the future.

Change-Id: I21af21f9e2e6383c9d89be5d94c5474f42e32aec
diff --git a/eclipse/plugins/com.android.ide.eclipse.monitor/src/com/android/ide/eclipse/monitor/SdkToolsLocator.java b/eclipse/plugins/com.android.ide.eclipse.monitor/src/com/android/ide/eclipse/monitor/SdkToolsLocator.java
index 64129d2..bd8ef60 100644
--- a/eclipse/plugins/com.android.ide.eclipse.monitor/src/com/android/ide/eclipse/monitor/SdkToolsLocator.java
+++ b/eclipse/plugins/com.android.ide.eclipse.monitor/src/com/android/ide/eclipse/monitor/SdkToolsLocator.java
@@ -61,7 +61,7 @@
     }
 
     public String getHprofConvLocation() {
-        return new File(getSdkToolsFolder(), FN_HPROF_CONV).getAbsolutePath();
+        return new File(getSdkPlatformToolsFolder(), FN_HPROF_CONV).getAbsolutePath();
     }
 
     private String getSdkToolsFolder() {