Changes 50.1.1:
* 9306 Layout Engine changes for harfbuzz integration
* 9677 Affixes set with e.g. DecimalFormat::setPositivePrefix now ignored for parse
* 9714 OS/400 test failures
* 9728 Fail building icu4c with mingw-w64
* 9737 Locale::GetDefault() in locid.cpp is not thread-safe
* 9771 Updated Currency from/to data (CLDR 5470)
* 9748 Visual Studio 2010/2012 issues
* 9780 UNUM_PARSE_INT_ONLY no longer handles grouping sep
* 9783 New Turkish Lira symbol
* 9789 Date format parsing problem with new CLDR data
* 9793 Currency data integration issue with CLDR 5470 changes
* 9801 UCONFIG_NO_CONVERSION test failure
* 9802 No data test failure
Updated textproc/icu to 50.1.1
Don't print the /bin/sh warning on SunOS-5.11, where /bin/sh is ksh93.