NaCl: Add new access right to process handle which is needed to speed up debug stub.
NaCl: Add new access right to process handle which is needed to speed up debug stub.

In order to remove sleep-waiting from debug stub, we need to send events on
exceptions in NaCl program from Chrome process to debug stub. This requires
duplicating event handle from NaCl process to Chrome process.

BUG= http://code.google.com/p/nativeclient/issues/detail?id=2952
TEST= none


Review URL: https://chromiumcodereview.appspot.com/11819057

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@176105 0039d316-1c4b-4281-b951-d872f2087c98

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