StdLib: Move GetPass.c out of Uefi and into PosixLib. Create LibPosix to contain...

StdLib: Move GetPass.c out of Uefi and into PosixLib.  Create LibPosix to contain all functions from PosixLib instead of individual libraries.  Retains the ability to use the individual libraries, except GetPass, for backwards compatibility.

StdLib/LibC/Uefi/GetPass.c
  COPY to StdLib/PosixLib/GetPass/GetPass.c
  DELETE
StdLib/PosixLib/GetPass/GetPass.c
  NEW, COPIED from StdLib/LibC/Uefi/GetPass.c
StdLib/PosixLib/PosixLib.inf
  Create a LibPosix library class to build all PosixLib functions into a single library.
  Move GetPass from LibC/Uefi to PosixLib.inf

StdLib/LibC/Uefi/Uefi.inf
  Remove GetPass.c from sources.
  Remove IPF from VALID_ARCHITECTURES
  Update VERSION_STRING
  Align [Defines] on a two-character boundary

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Daryl McDaniel <daryl.mcdaniel@intel.com>
Reviewed-by: Erik Bjorge <erik.c.bjorge@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15663 6f19259b-4bc3-4df7-8a09-765794883524