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/regexp.c

@@ -28,6 +28,7 @@
 #include "nvim/message.h"
 #include "nvim/os/input.h"
 #include "nvim/plines.h"
+#include "nvim/profile.h"
 #include "nvim/regexp.h"
 #include "nvim/strings.h"
 #include "nvim/vim.h"