bDebugBuildsActuallyUseDebugCRT does not work on OS X

Hi!

When I enable bDebugBuildsActuallyUseDebugCRT in unreal editor (Engine/Source/Programs/UnrealBuildTool/Configuration/BuildConfiguration.cs), then build ends up in a failure.
It can not find debug variant of icu dylib files, because Setup.command downloads them with a different naming convection. (linker searches for libicudatad.version.dylib instead of libucudata.versiond.dylib).

I had to modify two files to get it build and run successfully.

I am not sure I enabled bDebugBuildsActuallyUseDebugCRT in right place or it is even supported to set it to true anywhere.

I attached the patch file for UnrealEngine repository.

Hi amidabucu,

This was fixed in our internal build, and should be available in 4.8. If you are building from source, you can access fix with Hope that helps!