Apply change from upstream to fix PR/48709 - port-alpha/48709: static
threaded programs crash.

With this fix the new weak symbol's st_other is not merged in, i.e. NOPV
is not copied from the libc __libc_thr_init.

* elflink.c (_bfd_elf_merge_symbol): If merging a new weak
symbol that will be skipped, we don't have a new definition.
Decode alpha st_other
Add MKCOMPAT support for aarch64 (COMPAT_MACHINE_CPU)
Add some definitions for building RUMP libraries with MKCOMPAT.
#include <arm/ptrace.h> instead of <arm/asm.h>
(opps)
Add aarch64 to rump srcdirs
Change the way we default MK vars to yes or no allowing
MK<var>.${MACHINE_ARCH} to override.
e.g MKGDB.aarch64=no will default MKGDB to no on aarch64
Fix inconsistent use of inline in prototype and definition
- Add and use npf_alg_export().
- npf_conn_import: handle NAT metadata correctly.
- npf_nat_newpolicy: restore the policy ID.
- npfctl_load: fix error code handling for the limit cases.
- npf_config_import: fix the inverted logic.
- npfctl_load: improve error handling.
	http://m00nbsd.net/ae123a9bae03f7dde5c6d654412daf5a.html#Report-2

#04-0x02: Remove 'doclusterread' and 'doclusterwrite' (unused).
	http://m00nbsd.net/ae123a9bae03f7dde5c6d654412daf5a.html#Report-2

#04-0x01: Uninitialized var 'rqp' (does not compile anyway)
Trailing whitespace.
Make this compile when DIAGNOSTIC isn't defined.
Check for and delete ${DEST_DIR}/@RUNDIR@, not /@RUNDIR@.
Also remove an unnecessary eval in do_dhcpcdrundir and
fix a typo in the description.
Quoting fixes in several eval commands.
In get_makevar, ask make to recursively expand the variable,
not just print the unexpanded value.  This is done by
using make -V '${VAR}' instead of make -V 'VAR'.
Add a IMAGEPREBUILD option for makefiles to ovveride (e.g. to additionally
add files to the staging directory)
Add firmware images to this image, as discussed on port-arm.
Mark udf_lookup_complex as an expected failure, referencing PR kern/49033.
Since it does not fail reliably, force it to fail to avoid spurious failure
reports due to unexpected success.
Define AXEN_DEBUG.  From Takahiro HAYASHI.