Make fails if base folder contains spaces

[felixheidecke]

Steps to reproduce:

1. Have your ownCloud Core sit in a folder that contains spaces.
2. Try Make in the customgroups folder

Expected behavior

Make runs fine

Actual behavior

Make breaks as it can't find NAME/apps/customgroups/tools/composer.phar as in the example below.

Composer (version 1.4.2) successfully installed to: /home/[...]/FOLDER NAME/apps/customgroups/tools/composer.phar
Use it: php composer.phar

chmod u+x NAME/apps/customgroups/tools/composer.phar
chmod: Zugriff auf 'NAME/apps/customgroups/tools/composer.phar' nicht möglich: Datei oder Verzeichnis nicht gefunden

OS: Ubuntu 16.04