tests/tcg: enable building for AArch64

We only have compilers for the (default) little endian variants.
Signed-off-by: NAlex Bennée <alex.bennee@linaro.org>
Reviewed-by: NRichard Henderson <richard.henderson@linaro.org>
Reviewed-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>
Tested-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>

MAINTAINERS

@@ -136,6 +136,7 @@ L: qemu-arm@nongnu.org
 S: Maintained
 F: target/arm/
 F: tests/tcg/arm/
+F: tests/tcg/aarch64/
 F: hw/arm/
 F: hw/cpu/a*mpcore.c
 F: include/hw/cpu/a*mpcore.h

tests/tcg/aarch64/Makefile.include

+# Makefile.include for AArch64 targets
+#
+# We don't have any bigendian build tools so we only use this for AArch64
+
+ifeq ($(TARGET_NAME),aarch64)
+DOCKER_IMAGE=debian-arm64-cross
+DOCKER_CROSS_COMPILER=aarch64-linux-gnu-gcc
+endif