patch 8.1.2145: cannot map <C-H> when modifyOtherKeys is enabled

Problem:    Cannot map <C-H> when modifyOtherKeys is enabled.
Solution:   Add the <C-H> mapping twice, both with modifier and as 0x08.  Use
            only the first one when modifyOtherKeys has been detected.
diff --git a/src/if_ole.cpp b/src/if_ole.cpp
index cb643e5..34ce232 100644
--- a/src/if_ole.cpp
+++ b/src/if_ole.cpp
@@ -330,7 +330,7 @@
     }
 
     /* Translate key codes like <Esc> */
-    str = replace_termcodes((char_u *)buffer, &ptr, FALSE, TRUE, FALSE);
+    str = replace_termcodes((char_u *)buffer, &ptr, REPTERM_DO_LT, NULL);
 
     /* If ptr was set, then a new buffer was allocated,
      * so we can free the old one.