ArmPlatformPkg/Scripts/Makefile: Added support to automatically update the FIP

ArmPlatformPkg/Scripts/Makefile: Added support to automatically update the FIP

Some ARM development platforms use ARM Trusted Firmware to boot.
ARM Trusted Firmware encapsulates UEFI into the FIP (Firmware
Image Package) binary.
This change allows to update the FIP binary after building UEFI.

Example to build UEFI for FVP Base model:
$ make -f ArmPlatformPkg/Scripts/Makefile \
   EDK2_DSC=ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-FVP-AArch64.dsc \
   EDK2_ARCH=AARCH64 EDK2_TOOLCHAIN=GCC49 \
   FIP_BIN=~/arm-trusted-firmware/build/fvp/release/fip.bin

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <olivier.martin@arm.com>
Reviewed-by: Ronald Cron <Ronald.Cron@arm.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17296 6f19259b-4bc3-4df7-8a09-765794883524