MSVC: Fix version test for linking corelibc on Windows CE (#14420)

In commit 8fcf0ab0 (Add support for new Windows CE compiler, 2013-08-04)
we made corelibc conditional on the MSVC version, but the version value
was incorrect.  Update it to use corelibc for VS 2008 and below.
Merge topic 'wince-corelibc'

e63cf5f MSVC: Fix version test for linking corelibc on Windows CE (#14420)