Review swaps

[Brendan Jones]

I would like to swap reviews for the following. All are very tiny so 
feel free to swap 2 for one. Listed in descending priority:

https://bugzilla.redhat.com/show_bug.cgi?id=767583
python-poppler-qt4 - Qt4 poppler bindings

https://bugzilla.redhat.com/show_bug.cgi?id=760270
lv2-ams-plugins - LV2 port of the Alsa Modular Synth modules

https://bugzilla.redhat.com/show_bug.cgi?id=766154
lv2-kn0ck0ut - An LV2 spectral subtraction plugin (linux audio)

https://bugzilla.redhat.com/show_bug.cgi?id=754004
lv2-abGate - an LV2 Noise Gate plugin

I will be able to commence reviews from next Wednesday, unless anyone 
anyone responds this evening.

Thanks!

Brendan