arm/edk2-firmware: set do_configure[cleandirs] to ensure B is empty

Change-Id: I0df26d6f39613ee65cce5a297dbcd17f299ac0be
Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Jon Mason <jon.mason@arm.com>

meta-arm/recipes-bsp/uefi/edk2-firmware_git.bb

@@ -33,15 +33,13 @@ inherit deploy
 
 S = "${WORKDIR}/edk2"
 B = "${WORKDIR}/build"
-do_compile[cleandirs] += "${B}"
 
 PACKAGE_ARCH = "${MACHINE_ARCH}"
 COMPATIBLE_MACHINE ?= "invalid"
 
 LDFLAGS[unexport] = "1"
 
-# No configure
-do_configure[noexec] = "1"
+do_configure[cleandirs] += "${B}"
 
 # Set variables as per envsetup
 export GCC5_AARCH64_PREFIX = "${STAGING_BINDIR_TOOLCHAIN}/${TARGET_PREFIX}"