librcc: fix chinese charset with unzip

This update fixes the following issues with librcc:
- bnc#821877: rcc-runtime contains dynamic charset detection engines for librcc0 library. Thus it should be required by librcc0 instead of librcc main package, which doesn't exist at all.

Fixed bugs
bnc#821877
unzip can't detect Chinese charset due to missing rcc-runtime
Selected Binaries
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