libchewing: ambiguous data package name causes missing dependency

This udpate fixes the following issue with libchewing:
- bnc#808338:
+ retrack updstream sources
+ remove ambiguous libchewing package
+ enable ncurses wide-char and thread-safe (w6)
+ enable python
+ new sub-packages: chewing-data, python-chewing

Fixed bugs
bnc#808338
M17N/libchewing: malformed source and ambiguous data package name which lose dependency
Selected Binaries
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