Header cleanup.  Moved a couple of functions from .h to .cpp.

Change-Id: Ifd12a7632f75395bd0ef5e394d5c2abd6cbe28c6
diff --git a/native/jni/src/char_utils.cpp b/native/jni/src/char_utils.cpp
index 88803cb..45d49b0 100644
--- a/native/jni/src/char_utils.cpp
+++ b/native/jni/src/char_utils.cpp
@@ -16,6 +16,8 @@
 
 #include <cstdlib>
 
+#include "char_utils.h"
+
 namespace latinime {
 
 struct LatinCapitalSmallPair {