target-*: Advance pc after recognizing a breakpoint

Some targets already had this within their logic, but make sure
it's present for all targets.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>

target-s390x/translate.c

@@ -5360,6 +5360,11 @@ void gen_intermediate_code(CPUS390XState *env, struct TranslationBlock *tb)
         if (unlikely(cpu_breakpoint_test(cs, dc.pc, BP_ANY))) {
             status = EXIT_PC_STALE;
             do_debug = true;
+            /* The address covered by the breakpoint must be included in
+               [tb->pc, tb->pc + tb->size) in order to for it to be
+               properly cleared -- thus we increment the PC here so that
+               the logic setting tb->size below does the right thing.  */
+            dc.pc += 2;
             break;
         }