Add support for ndk libnativehelper build.

Bug: 10680559

Change-Id: I18491baac6acc4486f2e87175c922b40b5c17179
diff --git a/JniConstants.cpp b/JniConstants.cpp
index 52e3c1f..d6ac62d 100644
--- a/JniConstants.cpp
+++ b/JniConstants.cpp
@@ -14,6 +14,9 @@
  * limitations under the License.
  */
 
+#define LOG_TAG "JniConstants"
+
+#include "ALog-priv.h"
 #include "JniConstants.h"
 #include "ScopedLocalRef.h"