bugmailer: prevent building on pdk builds

bugmailer is in java, so it won't build on pdk builds.  It should
probably be moved out of system/extras.

Change-Id: I9423b565cff2078290390fab22d6622a06959b05

bugmailer/Android.mk

@@ -1,9 +1,12 @@
 # Copyright 2011 The Android Open Source Project
 #
 LOCAL_PATH:= $(call my-dir)
+
+ifneq ($(TARGET_BUILD_PDK), true)
 include $(CLEAR_VARS)
 
 LOCAL_SRC_FILES := $(call all-java-files-under, src)
 LOCAL_MODULE := send_bug
 LOCAL_MODULE_TAGS := optional
 include $(BUILD_JAVA_LIBRARY)
+endif