[processstarter] Handle Elastic and AdvantageScope (#8068)

Since they are in different directories, they need to be special cased
This is needed to support wpilibsuite/WPILibInstaller-Avalonia#492,
since those are currently handled by special scripts.

processstarter/src/main/native/linux/main.h

@@ -0,0 +1,11 @@
+// Copyright (c) FIRST and other WPILib contributors.
+// Open Source Software; you can modify and/or share it under the terms of
+// the WPILib BSD license file in the root directory of this project.
+
+#pragma once
+
+#include <filesystem>
+
+int StartExeTool(std::filesystem::path& exePath);
+int StartJavaTool(std::filesystem::path& exePath);
+int main(int argc, char* argv[]);