[jit] Disable the interval based linear scan algorithm in aot+debug m…

…ode, since it doesn't respect cfg->disable_reuse_registers, leading to problems during debugging when registers are shared between variables.

mono/mini/linear-scan.c

@@ -80,7 +80,7 @@ mono_linear_scan (MonoCompile *cfg, GList *vars, GList *regs, regmask_t *used_ma
 	regmask_t used_regs = 0;
 	gboolean cost_driven;
 
- 	if (vars && (((MonoMethodVar*)vars->data)->interval != NULL)) {
+	if (!cfg->disable_reuse_registers && vars && (((MonoMethodVar*)vars->data)->interval != NULL)) {
  		mono_linear_scan2 (cfg, vars, regs, used_mask);
  		return;
  	}