Fix prefix build

Deploy resources, locales, icu and plugins into the build directory
instead of install directory. It is necessary when Qt is configured
with -developer-build and -prefix options: the compilation may fail
if user has no write access for install directory.

Task-number: QTBUG-45796
Change-Id: I425f26fcb4b611c255dd744cb9b4eafe16015d6f
Reviewed-by: Andras Becsi <andras.becsi@theqtcompany.com>