Speexrate linking build artifacts in installation directory?

alsa-project/alsa-plugins issue #55 was opened from MIvanchev:

It seems to me that the [Makefile](https://github.com/alsa-project/alsa-plugins/blob/master/pph/Makefile.am#L31) is linking build artifacts instead of copying them... Also the install hook is assuming those `.so` files exist which seems to be the case but should not be copied over when `--enable-static --disable-shared` is specified. It happens only for that plugin.

Issue URL : https://github.com/alsa-project/alsa-plugins/issues/55 Repository URL: https://github.com/alsa-project/alsa-plugins