patch 8.2.3445: on Solaris longVersion may be declared twice

Problem:    On Solaris longVersion may be declared twice. (Vladimir Marek)
Solution:   Always declare longVersion in version.c
diff --git a/src/globals.h b/src/globals.h
index 1cbcf5c..4a6e027 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -1333,7 +1333,7 @@
 #if defined(HAVE_DATE_TIME) && defined(VMS) && defined(VAXC)
 extern char longVersion[];
 #else
-EXTERN char *longVersion INIT(= NULL);
+extern char *longVersion;
 #endif
 
 /*