Build all samples against SDK.

Change-Id: I9ea35c07a7f9d2e2a42d952101e99528fd68fb6c
diff --git a/samples/JetBoy/Android.mk b/samples/JetBoy/Android.mk
index 2e6b571..9adb663 100755
--- a/samples/JetBoy/Android.mk
+++ b/samples/JetBoy/Android.mk
@@ -7,4 +7,6 @@
 
 LOCAL_PACKAGE_NAME := JETBoy
 
+LOCAL_SDK_VERSION := current
+
 include $(BUILD_PACKAGE)