patch 8.0.1032: "make tags" doesn't work well on MS-Windows

Problem:    "make tags" doesn't work well on MS-Windows.
Solution:   Add or fix tags target. (Ken Takata)
diff --git a/src/Make_mvc.mak b/src/Make_mvc.mak
index c8c1d11..33d6dcb 100644
--- a/src/Make_mvc.mak
+++ b/src/Make_mvc.mak
@@ -344,7 +344,8 @@
 !endif
 
 !ifndef CTAGS
-CTAGS = ctags
+# this assumes ctags is Exuberant ctags
+CTAGS = ctags -I INIT+ --fields=+S
 !endif
 
 !ifndef CSCOPE
@@ -1220,7 +1221,7 @@
 
 
 tags: notags
-	$(CTAGS) *.c *.cpp *.h if_perl.xs proto\*.pro
+	$(CTAGS) *.c *.cpp *.h if_perl.xs
 
 notags:
 	- if exist tags del tags