patch 9.0.2025: no cmdline completion for ++opt args

Problem:  no cmdline completion for ++opt args
Solution: Add cmdline completion for :e ++opt=arg and :terminal
          [++options]

closes: #13319

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Yee Cheng Chin <ychin.git@gmail.com>
diff --git a/src/vim.h b/src/vim.h
index 2bafda4..2b6c787 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -824,6 +824,8 @@
 #define EXPAND_RUNTIME		53
 #define EXPAND_STRING_SETTING	54
 #define EXPAND_SETTING_SUBTRACT	55
+#define EXPAND_ARGOPT		56
+#define EXPAND_TERMINALOPT	57
 
 // Values for exmode_active (0 is no exmode)
 #define EXMODE_NORMAL		1