toolchain/binutils: switch to version 2.37 by default

toolchain/binutils: switch to version 2.37 by default

Compile tests:
* all

Runtime tests:
* ipq806x/generic
* lantiq/mt7621
* lantiq/xrx200
* x86/64

Signed-off-by: Paul Spooren <mail@aparcar.org>
Tested-by: Paul Spooren <mail@aparcar.org>
Tested-by: Rosen Penev <rosenp@gmail.com>
Tested-by: Andre Heider <a.heider@gmail.com>
Tested-by: Ansuel Smith <ansuelsmth@gmail.com>
Tested-by: Rui Salvaterra <rsalvaterra@gmail.com>
Signed-off-by: Paul Spooren <mail@aparcar.org>