Commit 3c59d94637ad ("BaseTools/FCE: Add a tool FCE") added a new tool
that is always built. Pre-existing tools locate the makefile includes
with relative paths, but FCE uses EDK_TOOLS_PATH, adding a new dependency
on having sourced edksetup.sh before building BaseTools.
Change FCE GNUmakefile to match other tools.
Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
Reviewed-by: Liming Gao <liming.gao@intel.com>