patch 8.2.0673: cannot build Haiku in shadow directory

Problem:    Cannot build Haiku in shadow directory.
Solution:   Add symlink. (Ozaki Kiichi, closes #6023)
diff --git a/src/Makefile b/src/Makefile
index 12ec23c..8a12cb8 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -2918,7 +2918,7 @@
 #  % make
 SHADOWDIR = shadow
 
-LINKEDFILES = ../*.[chm] ../*.in ../*.sh ../*.xs ../*.xbm ../gui_gtk_res.xml ../toolcheck ../proto ../libvterm ../vimtutor ../gvimtutor ../install-sh ../Make_all.mak
+LINKEDFILES = ../*.[chm] ../*.cc ../*.in ../*.sh ../*.xs ../*.xbm ../gui_gtk_res.xml ../toolcheck ../proto ../libvterm ../vimtutor ../gvimtutor ../install-sh ../Make_all.mak
 
 shadow:	runtime pixmaps
 	$(MKDIR_P) $(SHADOWDIR)
diff --git a/src/version.c b/src/version.c
index 140871c..7267318 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    673,
+/**/
     672,
 /**/
     671,