[oe] Libiio Python Bindings

[Martin Siegumfeldt]

Hi,

I noticed that since http://lists.openembedded.org/pipermail/openembedded-devel/2019-October/202502.html was merged, libiio started depending on 'python3-core', even without any dependencies defined towards libiio-python3. 

We use 

RDEPENDS_${PN} += "libiio"

for describing the (native library) dependency (i.e. without bindings), and

RDEPENDS_${PN} += "libiio-${PYTHON_PN}"

for a dependency including the bindings - isn't this valid?

I assume, that a pure native library dependency (i.e. without python bindings) should not introduce any python core functionality?

Thanks,
Martin Siegumfeldt