debian Build-depends: binutils-dev is not needed

[rodolforg]

I can successfully build grive2 without binutils-dev dependency. I think it can be safely removed from debian/control file.

[jankatins]

I've now also build it without binutils-dev installed and it works, both the compite and running a sync. This would be great because currently every binutil update on debian unstable needs a rebuild of grive because the dependencies are so tight.

This is what i get as dependencies of the binary grive package:

epends: libboost-filesystem1.67.0, libboost-program-options1.67.0, libboost-regex1.67.0 (>= 1.67.0-10), libboost-system1.67.0, libc6 (>= 2.14), libcurl3-gnutls (>= 7.16.2), libgcc1 (>= 1:3.0), libgcrypt20 (>= 1.8.0), libstdc++6 (>= 9), libyajl2 (>= 2.0.4)

[jankatins]

master does not contain a debian dependency on binutils-dev anymore, so this can be closed.