StdLib: Move libraries from ShellPkg into MdeModulePkg and MdePkg.

StdLib: Move libraries from ShellPkg into MdeModulePkg and MdePkg.

The following libraries are being migrated out of ShellPkg in order to make
their functionality more widely available.
  • PathLib:        Incorporate into MdePkg/Library/BaseLib
  • FileHandleLib:  MdePkg/Library/UefiFileHandleLib
  • BaseSortLib:    MdeModulePkg/Library/BaseSortLib
  • UefiSortLib:    MdeModulePkg/Library/UefiSortLib

AppPkg.dsc:
StdLib.dsc:
StdLib.inc:
  Delete PathLib LibraryClass description.
  Update FileHandleLib LibraryClass description to reflect its new location.
  Update SortLib LibraryClass description to reflect its new location.

StdLib.inf:
  Delete PathLib from LibraryClasses.

realpath.c:
  Delete include of PathLib.h.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Daryl McDaniel <daryl.mcdaniel@intel.com>
Reviewed-by: Jaben Carsey <jaben.carsey@intel.com>
Reviewed-by: Lee Rosenbaum <lee.g.rosenbaum@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16608 6f19259b-4bc3-4df7-8a09-765794883524