8201246: Export native function to set platform encoding

Reviewed-by: rriggs

src/java.base/share/native/libjava/jni_util.c

@@ -774,8 +774,10 @@ newStringUTF8(JNIEnv *env, const char *str)
     return newSizedStringJava(env, str, len);
 }
 
-/* Initialize the fast encoding from the encoding name. */
-void
+/* Initialize the fast encoding from the encoding name.
+ * Export InitializeEncoding so that the VM can initialize it if required.
+ */
+JNIEXPORT void
 InitializeEncoding(JNIEnv *env, const char *encname)
 {
     jclass strClazz = NULL;

src/java.base/share/native/libjava/jni_util.h

@@ -388,7 +388,7 @@ enum {
 
 int getFastEncoding();
 
-void InitializeEncoding(JNIEnv *env, const char *name);
+JNIEXPORT void InitializeEncoding(JNIEnv *env, const char *name);
 
 void* getProcessHandle();