License files can be in SRCDIR ({licensepath}). In fact we set {licensepath}
in solenv/bin/modules/installer/environment.pm:
    my $licensepath = $environment->{'SRCDIR'} . $installer::globals::separator . "readlicense_oo/license";
For example EULA_en-US.rtf is taken from here in Collabora Office.

Generated license files, such as LICENSE in text format for Linux packaging
are located in {customtargetpath}/readlicense_oo/license

Change-Id: Ieb1f3f4f1673ed8a2b2e975bbce928a8005182e1