Ensure FEATURE_COREFX_GLOBALIZATION is defined for runtime

Ensure FEATURE_COREFX_GLOBALIZATION is defined for runtime

A bunch of our System.Runtime.Tests.dll, System.Xml.XDocument.Properties.dll,
and other tests were failing with formatting errors.  The runtime tests were
also triggering a runtime assert at shutdown.  It appears that all of these
stem from a mismatch between some data structure layouts in mscorlib and
the runtime, in particular with NumberFormatInfo.

Several fields throughout NumberFormatInfo are included conditionally based
on the  FEATURE_COREFX_GLOBALIZATION flag not being defined.  This flag is
being set for the compilation of mscorlib, but it appears not to be set when
compiling all relevant parts of the runtime, such that the native structure has
extra fields not present in the managed structure.  This is resulting in fields
being misinterpreted by the runtime when using the structure for formatting
(and presumably it's also leading to some potential corruption).

This fix simply adds a define for FEATURE_COREFX_GLOBALIZATION to
the makefile.  The tests that were failing now pass, and the runtime assertion
is no longer firing.