Trailing whitespaces in privacy_ext

[Christophe Jarry]

Dear developers,

When I want to patch IceCat 3.6.13 source code to get the extracted version of
privacy_ext, quilt gives me the following warnings:

    Warning: trailing whitespace in line 7 of
browser/branding/unofficial/extensions/privacy_ext/install.rdf
    Warning: trailing whitespace in lines 79,512 of
browser/branding/unofficial/extensions/privacy_ext/COPYING

Could you please fix this, thanks.

Christophe