manylinux: clean the build directory before building wheels

Commit #c953dc0 removed the clean step to allow accessing configured files
when the script exists. However, when running two consecutive builds for
different tarball specialization, the 1st build directory must be cleaned
to make sure all libs are rebuilt for the right platform.

Author: LucasGandel

scripts/internal/manylinux-build-module-wheels.sh

@@ -90,6 +90,7 @@ for PYBIN in "${PYBINARIES[@]}"; do
       echo 'ITK source tree not available!' 1>&2
       exit 1
     fi
+    ${PYBIN}/python setup.py clean
     ${PYBIN}/python setup.py bdist_wheel --build-type Release -G Ninja -- \
       -DITK_DIR:PATH=${itk_build_dir} \
       -DITK_USE_SYSTEM_SWIG:BOOL=ON \