UnitTestFrameworkPkg/Library: Add library instances

https://bugzilla.tianocore.org/show_bug.cgi?id=2505

Add the following library instances that are used to
build unit tests for host and target environments.

* CmockaLib with cmocka submodule to:

  https://git.cryptomilk.org/projects/cmocka.git

* DebugLibPosix - Instance of DebugLib based on POSIX
  APIs (e.g. printf).
* MemoryAllocationLibPosix - Instance of MemoryAllocationLib
  based on POSIX APIs (e.g. malloc/free).
* UnitTestBootLibNull - Null instance of the UnitTestBootLib
* UnitTestBootLibUsbClass - UnitTestBootLib instances that
  supports setting boot next to a USB device.
* UnitTestLib - UnitTestLib instance that is designed to work
  with PEI, DXE, SMM, and UEFI Shell target environments.
* UnitTestLibCmocka - UintTestLib instance that uses cmocka
  APIs and can only be use in a host environment.
* UnitTestPersistenceLibNull - Null instance of the
  UnitTestPersistenceLib
* UnitTestPersistenceLibSimpleFileSystem - UnitTestPersistenceLib
  instance that can safe the unit test framework state to a
  media device that supports the UEFI Simple File System
  Protocol.
* UnitTestResultReportLibConOut - UnitTestResultReportLib
  instance that sends report results to the UEFI standard
  output console.
* UnitTestResultReportLibDebugLib - UnitTestResultReportLib
  instance that sends report results to a DebugLib using
  DEBUG() macros.

Cc: Sean Brogan <sean.brogan@microsoft.com>
Cc: Bret Barkelew <Bret.Barkelew@microsoft.com>
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Bret Barkelew <Bret.Barkelew@microsoft.com>

UnitTestFrameworkPkg/Library/UnitTestBootLibNull/UnitTestBootLibNull.c

@@ -0,0 +1,26 @@
+/**
+  NULL implementation for UnitTestBootLib to allow simple compilation
+
+  Copyright (c) Microsoft Corporation.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include <PiDxe.h>
+
+/**
+  Set the boot manager to boot from a specific device on the next boot. This
+  should be set only for the next boot and shouldn't require any manual clean up
+
+  @retval EFI_SUCCESS      Boot device for next boot was set.
+  @retval EFI_UNSUPPORTED  Setting the boot device for the next boot is not
+                           supportted.
+  @retval Other            Boot device for next boot can not be set.
+**/
+EFI_STATUS
+EFIAPI
+SetBootNextDevice(
+  VOID
+  )
+{
+  return EFI_UNSUPPORTED;
+}