Adds wpi GetHostname function (#25)

src/main/native/include/support/hostname.h

@@ -0,0 +1,24 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) FIRST 2017. All Rights Reserved.                             */
+/* Open Source Software - may be modified and shared by FRC teams. The code   */
+/* must be accompanied by the FIRST BSD license file in the root directory of */
+/* the project.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#ifndef HOSTNAME_H_
+#define HOSTNAME_H_
+
+#include <string>
+#include "llvm/StringRef.h"
+
+namespace llvm {
+  template <typename T>
+  class SmallVectorImpl;
+  }
+
+namespace wpi {
+std::string GetHostname();
+llvm::StringRef GetHostname(llvm::SmallVectorImpl<char>& name);
+}  // namespace wpi
+
+#endif  // HOSTNAME_H_