Possible deadlock in Utility::ExecuteProcess()

[BruceForstall]

jitutils/src/util/util.cs

Lines 239 to 240 in fdf42ea

	string stdout = process.StandardOutput.ReadToEnd();
	string stderr = process.StandardError.ReadToEnd();

According to the documentation, calling process.StandardOutput.ReadToEnd() followed by process.StandardError.ReadToEnd() can lead to deadlock.

[erozenfeld]

I fixed a similar issue in PMIDriver.cs in #252 .