libct/seccomp/patchpbf/test: fix for 32-bit
libct/seccomp/patchpbf/test: fix for 32-bit

This test fails to compile on i386:

> libcontainer/seccomp/patchbpf/enosys_linux_test.go:180:20: constant 3735928559 overflows int
> libcontainer/seccomp/patchbpf/enosys_linux_test.go:204:19: constant 3735928559 overflows int
> libcontainer/seccomp/patchbpf/enosys_linux_test.go:227:25: constant 3735928559 overflows int

This is because golang.org/x/net/bpf returns an int from their emulated
BPF VM implementation when they should really be returning uint32.

Fix by switching to uint32 in the test code.

Signed-off-by: Kir Kolyshkin <3a017b8ddb3f9cf3e4a59978b004111bdeb97f08@gmail.com>

estesp/runc,kolyshkin/runc,dqminh/runc,opencontainers/runc,opencontainers/runc,rhatdan/runc,estesp/runc,dqminh/runc,estesp/runc,opencontainers/runc,dqminh/runc,kolyshkin/runc,rhatdan/runc,dqminh/runc,rhatdan/runc,opencontainers/runc,kolyshkin/runc,rhatdan/runc,kolyshkin/runc