ProjectCenter setting GNUSTEP_INSTALLATION_DIR

[Nicola Pero]

ProjectCenter seems to be trying to hardcode GNUSTEP_INSTALLATION_DIR in
the GNUmakefiles ...

... don't sound like a good idea to me ;-)

The GNUmakefiles should always install in the default location.

If you want to install stuff in a different location, that is a
command-line flag (or shell variable)
you pass to 'make install' when you install.  Those flags shouldn't be
saved in the GNUmakefile
though.

Thanks