MFH: r431973

databases/memcached: temporarily hide DTRACE option on aarch64

/usr/sbin/dtrace -G -o memcached_dtrace.o -s ./memcached_dtrace.d ...
dt_modtext:/usr/src/cddl/lib/libdtrace/../../../cddl/contrib/opensolaris/lib/libdtrace/common/dt_link.c(841): DOODAD
dt_modtext:/usr/src/cddl/lib/libdtrace/../../../cddl/contrib/opensolaris/lib/libdtrace/common/dt_link.c(841): DOODAD
[...]
ld: memcached_dtrace.o.iRgx2j: Relocations in generic ELF (EM: 0)
memcached_dtrace.o.iRgx2j: error adding symbols: File in wrong format
dtrace: failed to link script ./memcached_dtrace.d: failed to link memcached_dtrace.o: ld exited with status 1

PR: 214556
Approved by: ports-secteam blanket