TBR: i#2119: for static DR, on a fault, also invoke the app handler

Commit log for first patchset:
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i#2119: for static DR, on a fault, also invoke the app handler

For static DR, invokes the app's fault handler, natively, on a DR fault.
This takes advantage of app error reporting facilities.
This is under a new on-by-default static-DR-only option
-invoke_app_on_crash.

If a fatal coredump is requested, the app's handler is tried first, and
only if that returns is a fatal coredump from the kernel attempted.

Adds a test api.static_crash.

Augments the api.static_signal test to also test SIGSEGV app handling.

Fixes #2119
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[bruening, 2016-12-22 23:41:52]

Committed as
https://github.com/DynamoRIO/dynamorio/commit/9d8e8abc71e8a984a966f1b82f442e5...

Final commit log: 
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i#2119: for static DR, on a fault, also invoke the app handler

For static DR, invokes the app's fault handler, natively, on a DR fault.
This takes advantage of app error reporting facilities.
This is under a new on-by-default static-DR-only option
-invoke_app_on_crash.

If a fatal coredump is requested, the app's handler is tried first, and
only if that returns is a fatal coredump from the kernel attempted.

Adds a test api.static_crash.

Augments the api.static_signal test to also test SIGSEGV app handling.

Fixes #2119

Review-URL: https://codereview.appspot.com/316050043
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