PR24758: increase stack size for BPF userspace interpreter

PR24758: increase stack size for BPF userspace interpreter

Requires parametrizing MAX_BPF_STACK by the target.

* bpf-internal.h (MAX_BPF_KERNEL_STACK): new constant.
(MAX_BPF_USER_STACK): new constant.
(MAX_BPF_STACK): change to a macro depending on target.
(program::use_tmp_space): pass target to MAX_BPF_STACK.

* bpf-opt.cxx (alloc_literal_str): pass target to MAX_BPF_STACK.
(spill): pass target to MAX_BPF_STACK.

* stapbpf/bpfinterp.cxx (bpf_interpret): increase stack size
to match MAX_BPF_USER_STACK in bpf-internal.h.