Capture Microsoft-defined HRESULT exit codes exit codes

The lack of such a check leads to false-passes of tests on Windows
which expect no output, but produce a segfault or similar issue. I
discovered this a while ago due to bad tests in an extension I maintain.

Closes phpGH-6722.

Author: dktapps

run-tests.php

@@ -1273,6 +1273,9 @@ function system_with_timeout($commandline, $env = null, $stdin = null, $captureS
     }
     if ($stat["exitcode"] > 128 && $stat["exitcode"] < 160) {
         $data .= "\nTermsig=" . ($stat["exitcode"] - 128) . "\n";
+    } else if (defined('PHP_WINDOWS_VERSION_MAJOR') && (($stat["exitcode"] >> 28) & 0b1111) === 0b1100) {
+        // https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-erref/87fba13e-bf06-450e-83b1-9241dc81e781
+        $data .= "\nTermsig=" . $stat["exitcode"] . "\n";
     }
 
     proc_close($proc);