Merge commit 'origin/dwarfless' into pr6429-comp-unwindsyms

Merge commit 'origin/dwarfless' into pr6429-comp-unwindsyms

* commit 'origin/dwarfless':
  The beginnings of a no-dwarf version of syscalls.stp.  Selected
  Added CPU REGISTERS and NUMBERED FUNCTION ARGUMENTS sections to
  Replaced [u_]arg() with [u]int_arg(), [u]long_arg(), {s|u}32_arg(),
  Added support for register(), u_register(), arg(), and u_arg() functions.
  * testsuite/{semok,semko}/nodwf*.stp
  PR 4311 - Function boundary tracing without debuginfo: Phase I