allow out-of-srctree builds on windows
allow out-of-srctree builds on windows

config_host (config_$(gb_Side) dir was included from SRCDIR, but when
runing the build in another directory, it is in BUILDDIR
WinResTarget.mk was forgotten when the other references were updated in
ae4e327739112ba326a2945fc0d5550739f3083d and follow-up ones.

Change-Id: I8c5a8edb4a17dd33abdcdb04c3af830cad44e07a
Reviewed-on: https://gerrit.libreoffice.org/3593
Reviewed-by: Fridrich Strba <cc5239b4c84e795cbd430bca0f77cadba002516f@documentfoundation.org>
Tested-by: Fridrich Strba <cc5239b4c84e795cbd430bca0f77cadba002516f@documentfoundation.org>

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core