For dbghelp in 32-bit, when accessing a live debuggee in multi-arch
configuration, Wine's ELF loader is likely mapped above 4G, hence
not accessible with 32bit Windows APIs.
So don't try to expose the ELF libraries in that case.
Introducing a new loader operation class to support live targets, for
which system operations are not accessible, but pretending they are
successful.

Note:
- when Wine's loader ELF module isn't registered by dbghelp,
  any other ELF module will not be registered by dbghelp.
- further work may be needed for winedbg in auto mode (launched with
  AeDebug key on process exception) as in that mode winedbg
  doesn't relaunch itself in 64bit, so won't be able to access
  (64bit) ELF information (in multi-arch configuration).
Signed-off-by: Eric Pouech <eric.pouech@gmail.com>