1.0.36.9: UD2-BREAKPOINTS feature for x86oid systems

1.0.36.9: UD2-BREAKPOINTS feature for x86oid systems

  * Add new feature UD2-BREAKPOINTS, enabled by default only on x86oid
darwin targets.

  * Use said feature instead of DARWIN for breakpoint trap selection.

  * Make breakpoints work when using UD2-BREAKPOINTS (tested on x86 and
x86-64 linux).

  * This patch brought to you by lp#309067, which remains valid for
three reasons: First, the test case is still disabled.  Second, this
only fixes for x86oids, not for PPC.  And third, I didn't actually test
this on a darwin system.