Enable lvmstrap to run under Linux 3.x
Enable lvmstrap to run under Linux 3.x

Extend the kernel version check to also accept Linux 3.x as valid.

Signed-off-by: Alexander Schreiber <als@google.com>
Signed-off-by: Iustin Pop <acf83a5274f31a43af6b914614365999469c1a31@google.com>
Reviewed-by: Iustin Pop <acf83a5274f31a43af6b914614365999469c1a31@google.com>
(cherry picked from commit 1bf72492d381aacb5c488f1a87ac7665b9ddc6c7)

Signed-off-by: Iustin Pop <acf83a5274f31a43af6b914614365999469c1a31@google.com>
Reviewed-by: Michael Hanselmann <68b67885ff74281219b4a4be33cc20fd45078d7c@google.com>

ganeti/ganeti,bitemyapp/ganeti,leshchevds/ganeti,leshchevds/ganeti,dimara/ganeti,ganeti/ganeti,andir/ganeti,yiannist/ganeti,leshchevds/ganeti,ganeti-github-testing/ganeti-test-1,apyrgio/snf-ganeti,apyrgio/snf-ganeti,yiannist/ganeti,onponomarev/ganeti,mbakke/ganeti,onponomarev/ganeti,apyrgio/ganeti,ganeti-github-testing/ganeti-test-1,andir/ganeti,ganeti/ganeti,grnet/snf-ganeti,mbakke/ganeti,yiannist/ganeti,dimara/ganeti,grnet/snf-ganeti,mbakke/ganeti,apyrgio/ganeti,bitemyapp/ganeti,andir/ganeti