Improve support for displaying Javanese script

* lisp/international/fontset.el (setup-default-fontset)
(script-representative-chars): Add Javanese entries.

* etc/HELLO: Fix the Javanese text.  See
https://omniglot.com/language/phrases/javanese.php for the
source.

etc/HELLO

@@ -61,7 +61,7 @@ Hindi (हिंदी)	नमस्ते / नमस्कार ।
 Inuktitut (ᐃᓄᒃᑎᑐᑦ)	ᐊᐃ
 
 Italian (italiano)	Ciao / Buon giorno
-Javanese (ꦧꦱꦗꦮ)	console.log("ꦱꦸꦒꦼꦁꦱꦶꦪꦁ");
+Javanese (ꦧꦱꦗꦮꦶ)	console.log("ꦲꦭꦺꦴ");
 Kannada (ಕನ್ನಡ)	ನಮಸ್ಕಾರ
 Khmer (ភាសាខ្មែរ)	ជំរាបសួរ
 Lao (ພາສາລາວ)	ສະບາຍດີ / ຂໍໃຫ້ໂຊກດີ

lisp/international/fontset.el

@@ -191,6 +191,7 @@
 	(kanbun #x319D)
 	(han #x5B57)
 	(yi #xA288)
+        (javanese #xA980)
 	(cham #xAA00)
 	(tai-viet #xAA80)
 	(hangul #xAC00)
@@ -723,6 +724,7 @@
 		    symbol
 		    braille
 		    yi
+                    javanese
 		    tai-viet
 		    aegean-number
 		    ancient-greek-number