buildroot

package/go: bump version to 1.6.2

Golang has significant improvements to support for multiarch in later
versions. This bump is required to make many go programs functional
under arm64, for example.

Signed-off-by: Christian Stewart <christian@paral.in>
Acked-by: Geoff Levand <geoff@infradead.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>