gdb/

gdb/
	Fix PR 9436.
	* breakpoint.c (handle_jit_event): New function.
	(bpstat_what): Remove enum class, kc, ss, sn, sgl, slr, clr, sr, shl,
	jit, err, table and bs_class.  New variables shlib_event, jit_event,
	this_action and bptype.  Change bs_class assignments to this_action
	assignments.  new unhandled bptype internal error.  Move here
	shlib_event and jit_event handling from handle_inferior_event.
	* breakpoint.h (enum bpstat_what_main_action): Extend the comment.
	Reorder items.  Remove BPSTAT_WHAT_CHECK_SHLIBS and
	BPSTAT_WHAT_CHECK_JIT.
	* inferior.h (debug_infrun, stop_on_solib_events): New declarations.
	* infrun.c (debug_infrun, stop_on_solib_events): Remove static.
	(handle_inferior_event): Reinitialize frame and gdbarch after
	bpstat_what call.  Move BPSTAT_WHAT_CHECK_SHLIBS and
	BPSTAT_WHAT_CHECK_JIT handling to bpstat_what.  Reinitialize even
	gdbarch when frame gets reinitialized.

gdb/testsuite/
	Test PR 9436.
	* gdb.base/nostdlib.exp, gdb.base/nostdlib.c: New.