optimization.
Newer versions of clang (in this case, trunk r231191) can see through
the pointless division by zero and optimize it away. This caused the
test to hang in release mode.
A 50ms timeout is added to each test to transform the hang into a
failure. The test was split into 12 tests to provide better feedback and
control.
To fix the bug, the division by zero is replaced by __builtin_trap().
TEST=crashpad_util_test ExceptionPorts.*
R=rsesek@chromium.org
Review URL: https://codereview.chromium.org/993613004