CPP: libphonenumber 4.6.

CPP: libphonenumber 4.6.

Note that the metadata files were not uploaded to appspot because they were too
large. Here is the list of the files affected by this change (generated by
Git):

cpp/src/phonenumbers/lite_metadata.cc
cpp/src/phonenumbers/logger.h
cpp/src/phonenumbers/metadata.cc
cpp/src/phonenumbers/phonenumbermatcher.cc
cpp/src/phonenumbers/phonenumberutil.cc
cpp/src/phonenumbers/phonenumberutil.h
cpp/src/phonenumbers/region_code.h
cpp/src/phonenumbers/stringutil.cc
cpp/src/phonenumbers/stringutil.h
cpp/test/phonenumbers/asyoutypeformatter_test.cc
cpp/test/phonenumbers/phonenumbermatcher_test.cc
cpp/test/phonenumbers/phonenumberutil_test.cc
cpp/test/phonenumbers/stringutil_test.cc

This CL also fixes the issue reported by Aaron about the logger being invoked
before it is initialized.

Review URL: https://codereview.appspot.com/5786065

git-svn-id: http://libphonenumber.googlecode.com/svn/trunk@430 ee073f10-1060-11df-b6a4-87a95322a99c