Disabling CppunitTest_i18npool_test_languagetag for now

... as it causes problems on Windows:

file:///C:/lo/core/solver/wntmsci12.pro/share/liblangtag%5Clanguage-subtag-registry.xml:709: parser error : Input is not proper UTF-8, indicate encoding !
Bytes: 0xE5 0x6C 0x3C 0x2F
     <description>Norwegian Bokmål</description>

Apart from the encoding issue (looks like that language-subtag-registry.xml
delivered from module liblangtag is generated as MS-1252 rather than UTF-8 on
Windows), what also looks worrying in the error message is the backslash encoded
as %5C (and the entity resolving that URL apparently decoding it somewhat
naively).

Change-Id: I756f911a92b144e3732f63668d36b4ae941f975a

i18npool/Module_i18npool.mk

@@ -63,7 +63,6 @@ endif
 $(eval $(call gb_Module_add_check_targets,i18npool,\
 	CppunitTest_i18npool_test_breakiterator \
 	CppunitTest_i18npool_test_characterclassification \
-	CppunitTest_i18npool_test_languagetag \
 ))
 
 # vim: set noet sw=4 ts=4: