- add baselibs.conf as source

- add icu-fix-tests-depending-on-date.patch to fix build
see http://sourceforge.net/p/icu/mailman/message/32443311/

- Ensure we escape the find %f properly.

- Version bump to 53.1:
* Data from the CLDR 25 release: Many bug fixes
* Time zone data: 2014b, including post CLDR 25 time zone data
update to CLDR.
* U+20BD Ruble Sign added (from Unicode 7.0, otherwise ICU 53
still uses Unicode 6.3)
* Collation code re-implemented
* ICU4C now requires compilers with C99 support
* Updated Spoof Checker for Unicode Security Standard version
6.3. (#10706)
* many more see http://site.icu-project.org/download/53

- Clean up with spec-cleaner and remove some obsolete provide/obsolete
- Use official download tarballs instead of repacks