[fuchsia] do not try to suspend crashed thread
[fuchsia] do not try to suspend crashed thread

* a thread blocked in an exception is technically not suspended on Fuchsia
* this will take care of the spurious error message "thread failed to suspend: ZX_ERR_TIMED_OUT (-21)" introduced in https://chromium-review.googlesource.com/c/crashpad/crashpad/+/1536268

Bug: fuchsia/ZX-3772
Tested: `fx run-test crashpad_test` on Fuchsia; verified with `fx shell crasher` no error message
Change-Id: I5306732ef7c5a4f2c0fe84bc072506d57a43931e
Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/1538558
Reviewed-by: Joshua Peraza <f5809a5e35ec7e1bd0e25cb0a0b68bb433cf6f17@chromium.org>
Commit-Queue: Francois Rousseau <abdb75be6d92482eb3ea75e9341306a6fcc3aacd@google.com>

chromium/crashpad,chromium/crashpad,chromium/crashpad