Telescope ICU changes:

Add support for U_PF_SONY (Sony platforms).
./source/common/unicode/platform.h
./source/common/putil.cpp
./source/common/putilimp.h
./source/common/unistr.cpp
./source/common/uposixdefs.h

Disable ICU umapfile which access the file by using memory map file.
./source/common/umapfile.cpp

Temporary fix to load ICU data from specific location
./source/common/udata.cpp

Remove <condition_variable> include from umutex.h
./source/common/umutex.h

Added files:
./source/common/stubdata.cpp (copied from stubdata project)
./source/common/ulayout_props_data.h (generated)
./Build.Windows.Library.ProjectConfiguration.props
./Build.Windows.ProjectConfiguration.props
./icucommon.vcxproj
./icucommon.vcxproj.filters
./TELESCOPE.CHANGES.txt (this file)
./telescope.icucommon.props

Add support for Durango XDK
./icucommon_vs2017.vcxproj
./icucommon_vs2017.vcxproj.filters
