valgrind: bump to version 3.10.1

Add hash file and switch to a non-dead homepage.
Enable for supported architectures: powerpc64 & powerpc64le.
Even though aarch64 is supported it's still a bit rought resulting in
build failures so don't enable it for now.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>