icu: Adjust ICU_DATA_DIR path on big endian targets

icu: Adjust ICU_DATA_DIR path on big endian targets

On big-endian systems the preprocessor define ICU_DATA_DIR
is currently being set to a path ending with the ${PV} of
the recipe.

The PV version string has changed to a '-' separator
since oe-core commit cebe8439cdc656d53355506a31a3782312bf03c5
whereas the build system installs the data files into a
path ending with the dot-separated version of ICU.

This causes the ICU data file to not be detected at runtime,
consequently breaking any dependant applications.

We therefore substitute ${PV} with the dot-separated version
string of ICU, as returned from the icu_install_folder function,
on the ICU_DATA_DIR define on big-endian targets.

Signed-off-by: Makarios Christakis <makchrbiz@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>