add unicode common file, get names right

quantum/process_keycode/process_unicodemap.h

@@ -2,6 +2,7 @@
 #define PROCESS_UNICODEMAP_H
 
 #include "quantum.h"
+#include "process_unicode_common.h"
 
 void unicode_map_input_error(void);
 bool process_unicode_map(uint16_t keycode, keyrecord_t *record);