Update submodule rtosc - zynaddsubfx - ZynAddSubFX open source synthesizer

commit 6738914755d76aa0a7eec0404565a421c1aafa6b
parent 6447bafaae3cb1043513421eef552152decccb31
Author: Johannes Lorenz <johannes89@ist-einmalig.de>
Date:   Sun, 12 Nov 2017 01:29:05 +0100

Update submodule rtosc

	zynaddsubfx ZynAddSubFX open source synthesizer
	Log \| Files \| Refs \| Submodules \| LICENSE