mg: add new package/microscopic emacs style editor

For Emacsian!

You can use "Dired", which is Emacsian's favorite.
You can also use "re-search".

Signed-off-by: Hirokazu MORIKAWA <morikw2@gmail.com>

utils/mg/patches/901-use_pcre.patch

@@ -0,0 +1,11 @@
+--- a/re_search.c
++++ b/re_search.c
+@@ -16,7 +16,7 @@
+ #ifdef REGEX
+ #include <sys/queue.h>
+ #include <sys/types.h>
+-#include <regex.h>
++#include <pcreposix.h>
+ #include <signal.h>
+ #include <stdio.h>
+ #include <string.h>