patch 8.1.0103: long version string cannot be translated

Problem:    Long version string cannot be translated.
Solution:   Build the string in init_longVersion().
diff --git a/src/proto/version.pro b/src/proto/version.pro
index cd44e8b..8139772 100644
--- a/src/proto/version.pro
+++ b/src/proto/version.pro
@@ -1,5 +1,5 @@
 /* version.c */
-void make_version(void);
+void init_longVersion(void);
 int highest_patch(void);
 int has_patch(int n);
 void ex_version(exarg_T *eap);