patch 8.0.0012

Problem:    Typos in comments.
Solution:   Change "its" to "it's". (Matthew Brener, closes #1088)

src/quickfix.c

@@ -3569,7 +3569,7 @@ get_mef_name(void)
 	STRCAT(name, p + 2);
 	if (mch_getperm(name) < 0
 #ifdef HAVE_LSTAT
-		    /* Don't accept a symbolic link, its a security risk. */
+		    /* Don't accept a symbolic link, it's a security risk. */
 		    && mch_lstat((char *)name, &sb) < 0
 #endif
 		)