fix(fiptool): move juno plat_fiptool.mk

plat_fiptool.mk files now need to be in tools/fiptool/plat_fiptool/, so
this file has been moved to the new location so that it is picked up
correctly by the build system.

Change-Id: Id3596b08bc856362e300f3dfefcaab5d75b4c400
Signed-off-by: Rob Hughes <robert.hughes@arm.com>
diff --git a/plat/arm/board/juno/plat_fiptool.mk b/tools/fiptool/plat_fiptool/arm/board/juno/plat_fiptool.mk
similarity index 100%
rename from plat/arm/board/juno/plat_fiptool.mk
rename to tools/fiptool/plat_fiptool/arm/board/juno/plat_fiptool.mk