Install the prebuilt current SDK for checkbuild

so later users can run tapas and mm/mmm on Android.mk with
"LOCAL_SDK_VERSION := current".

Change-Id: I48c04e5ff7071084bdc9281fa0705604808d61d4
diff --git a/Android.mk b/Android.mk
index 4b7d5a0..b78e5a8 100644
--- a/Android.mk
+++ b/Android.mk
@@ -40,4 +40,9 @@
 
 $(foreach s,$(TARGET_AVAILABLE_SDK_VERSIONS),$(eval $(call _copy_prebuilt_sdk_to_the_right_place,$(s))))
 
+# Make sure we install the prebuilt current sdk when you do a checkbuild
+# so later users can run tapas and mm/mmm on an Android.mk with "LOCAL_SDK_VERSION := current".
+# That Android.mk may not be visible to platform build.
+checkbuild : $(call intermediates-dir-for,JAVA_LIBRARIES,sdk_vcurrent,,COMMON)/classes.jar
+
 include $(call all-makefiles-under,$(LOCAL_PATH))