patch 8.1.1781: Amiga: no builtin OS readable version info

Problem:    Amiga: no builtin OS readable version info.
Solution:   Add a "version" variable. (Ola Söder, closes #4753)
diff --git a/src/version.c b/src/version.c
index 15577e0..855c0fe 100644
--- a/src/version.c
+++ b/src/version.c
@@ -778,6 +778,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1781,
+/**/
     1780,
 /**/
     1779,