Sounds/BuildSystem: Modifications to include new releases and Japanese language.

Modifying Makefile and sounds.xml to include new core 1.4.26 and extra 1.4.15
sound prompt releases, plus the new Japanese core sound prompts contributed
by QLOOG.

ASTERISK-23324
Reported by: Kevin McCoy
Tested by: Rusty Newton
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Merged revisions 422789 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 422790 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: http://svn.asterisk.org/svn/asterisk/branches/12@422791 f38db490-d61c-443f-a65b-d21fe96a405b