qemu_v8: use current GCC instead of legacy toolchain

Signed-off-by: Joakim Bech <joakim.bech@linaro.org>
Tested-by: Joakim Bech <joakim.bech@linaro.org>
Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>
diff --git a/qemu_v8.mk b/qemu_v8.mk
index 4275866..6ae28e7 100644
--- a/qemu_v8.mk
+++ b/qemu_v8.mk
@@ -84,7 +84,7 @@
 endef
 
 define edk2-call
-        GCC49_AARCH64_PREFIX=$(LEGACY_AARCH64_CROSS_COMPILE) \
+        GCC49_AARCH64_PREFIX=$(AARCH64_CROSS_COMPILE) \
         build -n `getconf _NPROCESSORS_ONLN` -a AARCH64 \
                 -t GCC49 -p ArmVirtPkg/ArmVirtQemuKernel.dsc \
 		-b DEBUG