Add missing POSIX exit codes to enums for CrashExitCodes.

These are obtained from the reverse of WTERMSIG macro - e.g. WTERMSIG(132)
is 4 which is SIGILL defined in sys/signal.h

BUG=None

Change-Id: Ifbfb9895354ca511f2787d21feb4b33e415fd8ec
Reviewed-on: https://chromium-review.googlesource.com/773778Reviewed-by: Alexei Svitkine <asvitkine@chromium.org>
Commit-Queue: Alexei Svitkine <asvitkine@chromium.org>
Cr-Commit-Position: refs/heads/master@{#517423}

tools/metrics/histograms/enums.xml

@@ -6925,6 +6925,16 @@ Called by update_net_error_codes.py.-->
   <int value="28" label="RESULT_CODE_SXS_MIGRATION_FAILED"/>
   <int value="29" label="RESULT_CODE_ACTION_DISALLOWED_BY_POLICY"/>
   <int value="30" label="RESULT_CODE_INVALID_SANDBOX_STATE"/>
+  <int value="131" label="SIGQUIT"/>
+  <int value="132" label="SIGILL"/>
+  <int value="133" label="SIGTRAP"/>
+  <int value="134" label="SIGABRT"/>
+  <int value="135" label="SIGBUS (7)"/>
+  <int value="136" label="SIGFPE"/>
+  <int value="137" label="SIGKILL"/>
+  <int value="138" label="SIGBUS (10)"/>
+  <int value="139" label="SIGSEGV"/>
+  <int value="140" label="SIGSYS"/>
   <int value="258" label="WAIT_TIMEOUT"/>
   <int value="7006" label="SBOX_FATAL_INTEGRITY"/>
   <int value="7007" label="SBOX_FATAL_DROPTOKEN"/>