Optimise LocaleDataWrapper for reads by initialising the
data we in the constructor, so we don't need any kind of
locking
Reduces load time from 34s to 28s.
Change-Id: I4bd3bddb30b70ba015fe5b1372534f9507762b74
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/114960
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>