FatBinPkg/License.txt: Sync with License.txt in FatPkg

The License.txt file in FatPkg was changed to add UEFI.
This change syncronizes the License.txt file from FatPkg
into FatBinPkg.

Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13188 6f19259b-4bc3-4df7-8a09-765794883524