PyDependences: require 'auditwheel' Python package only if a wheel is to be produced

Resolves #653

cmake/multipython/PyDependences.cmake

@@ -22,7 +22,7 @@ message(STATUS "Python package destination directory: ${destination_pypackage}")
 # check presence of some Python modules
 message(STATUS "Searching required Python packages...")
 set(py_packages "pip;numpy;matplotlib")
-if(LINUX)
+if(LINUX AND BA_PY_PACKAGE)
     # on Linux, `auditwheel` is needed to produce 'manylinux' wheels repair (PEP 599)
     list(APPEND py_packages "auditwheel")
 endif()