update DynamoRIO to r1802

git-svn-id: https://drmemory.googlecode.com/svn/trunk@1143 5b54908e-ead4-fc18-b48a-0285e6dbc711
revert part of r1143

git-svn-id: https://drmemory.googlecode.com/svn/trunk@1144 5b54908e-ead4-fc18-b48a-0285e6dbc711
Fix drdsys_init() docs wrt multiple calls

git-svn-id: https://drmemory.googlecode.com/svn/trunk@1145 5b54908e-ead4-fc18-b48a-0285e6dbc711
Merge branch 'master' into user-track-mouse-event