Added arm64 target to docker run examples. Also removed
feature quotes as they're not nessesary and don't match
the non-quoted examples of targets in the WIKI
#
# If only one architecture is desired, cargo can be invoked directly with the appropriate options :
# $ docker run -v /tmp/librespot-build:/build librespot-cross cargo build --release --no-default-features --features "alsa-backend"
-# $ docker run -v /tmp/librespot-build:/build librespot-cross cargo build --release --target arm-unknown-linux-gnueabihf --no-default-features --features "alsa-backend"
-# $ docker run -v /tmp/librespot-build:/build librespot-cross cargo build --release --target arm-unknown-linux-gnueabi --no-default-features --features "alsa-backend"
+# $ docker run -v /tmp/librespot-build:/build librespot-cross cargo build --release --target arm-unknown-linux-gnueabihf --no-default-features --features alsa-backend
+# $ docker run -v /tmp/librespot-build:/build librespot-cross cargo build --release --target arm-unknown-linux-gnueabi --no-default-features --features alsa-backend
+# $ docker run -v /tmp/librespot-build:/build librespot-cross cargo build --release --target aarch64-unknown-linux-gnu --no-default-features --features alsa-backend
+
# $ docker run -v /tmp/librespot-build:/build librespot-cross contrib/docker-build-pi-armv6hf.sh
FROM debian:stretch
