vim-patch:8.1.1684: profiling functionality is spread out

Problem:    Profiling functionality is spread out.
Solution:   Put profiling functionality in profiling.c. (Yegappan Lakshmanan,
            closes vim/vim#4666)
fa55cfc69d

Move proftime_T to types.h for now to avoid recursive #include.

src/nvim/profile.h

@@ -4,7 +4,7 @@
 #include <stdint.h>
 #include <time.h>
 
-typedef uint64_t proftime_T;
+#include "nvim/ex_cmds_defs.h"
 
 #define TIME_MSG(s) do { \
   if (time_fd != NULL) time_msg(s, NULL); \