https://bugzilla.tianocore.org/show_bug.cgi?id=2261 Add the UefiFileHandleLib to the [Components] section of the MdePkg DSC file to support full build testing of the MdePkg. Cc: Michael D Kinney <michael.d.kinney@intel.com> Cc: Liming Gao <liming.gao@intel.com> Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com> Reviewed-by: Liming Gao <liming.gao@intel.com>