Windows: Build afs_shl_ext.dll with talocaleU.lib

Windows: Build afs_shl_ext.dll with talocaleU.lib

Use the Unicode version of talocale to properly read
resource strings.

Reviewed-on: http://gerrit.openafs.org/3442
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@openafs.org>
Tested-by: Jeffrey Altman <jaltman@openafs.org>
(cherry picked from commit 6fe9313180dfe1d509ae97a1e16a67195357cf7b)

Change-Id: I38b4b45e6868283a7f59071f6326389dd569ea2d
Reviewed-on: http://gerrit.openafs.org/3790
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>