[POHIC] Makefile - updated the check for xeno-config based on the pattern used for the win32 compiler


git-svn-id: https://tecsw.estec.esa.int/svn/taste/trunk/po-hi-c@6914 129961e7-ef38-4bb5-a8f7-c9a525a55882
Merge remote-tracking branch 'git-svn'