i#1703/i#1698 cache simulator: move strex instrumentation to after the strex
i#1703/i#1698 cache simulator: move strex instrumentation to after the strex

This CL moves the strex instrumentation from before the strex to after the strex
if possible to reduce the instrumentation code between ldrex/strex pairs.

Review-URL: https://codereview.appspot.com/253780043

code4bones/dynamorio,bl4ckic3/dynamorio,code4bones/dynamorio,bl4ckic3/dynamorio,daksunt/dynamorio,daksunt/dynamorio,code4bones/dynamorio,bl4ckic3/dynamorio,code4bones/dynamorio,AmesianX/dynamorio,AmesianX/dynamorio,code4bones/dynamorio,AmesianX/dynamorio,daksunt/dynamorio,bl4ckic3/dynamorio,daksunt/dynamorio,AmesianX/dynamorio,AmesianX/dynamorio,daksunt/dynamorio,bl4ckic3/dynamorio