package/musl: enable on AArch64 big endian

Add aarch64_be to musl supported archs. Upstream musl already supports
aarch64_be.

Signed-off-by: Jonathan Currier <dullfire@yahoo.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/musl/Config.in

@@ -1,6 +1,7 @@
 config BR2_PACKAGE_MUSL_ARCH_SUPPORTS
 	bool
 	default y if BR2_aarch64
+	default y if BR2_aarch64_be
 	default y if BR2_arm
 	default y if BR2_armeb
 	default y if BR2_i386