Merge branch 'volk-qa-fixes'

Conflicts:
	volk/apps/volk_profile.cc
blocks: Add QA tests for the rotator rotateN function which uses VOLK

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
blocks/rotator: Make the input data 'const'

The volk kernels are const and there is no reason to clobber the input

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
blocks: Add a new rotator_cc block to perform frequency shifting

It internally uses the rotator.h helper that was already present,
which in turn makes uses of VOLK rotator kernel

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>