add arm and arm64 to rawinstall script

scripts/rawinstall.sh

@@ -49,18 +49,37 @@ else
     OS=unknown
 fi
 
-if [ "$(uname -m)" = "x86_64" ]; then
+case "$(uname -m)" in 
+x86_64)
     ARCH=amd64
-elif [ "$(uname -m)" = "x86" ] || [ "$(uname -m)" = "i386" ] || [ "$(uname -m)" = "i686" ]; then
+    ;;
+x86|i386|i686)
     ARCH=386
-else
+    ;;
+arm64|aarch64|armv8b|armv8l)
+    ARCH=arm64
+    ;;
+arm)
+    ARCH=armv6
+    ;;
+*)
     ARCH=unknown
-fi
+    ;;
+esac
 
+if [ "$OS" = darwin ]; then
+    if [ "$ARCH" = armv6 ] || [ "$ARCH" = arm64 ]; then
+        echo "It seems that you are running macOS on arm - exiting!"
+        echo "Expected Linux or macOS on x86_64 or i386 (or Linux on arm or arm64)"
+        echo "Got OS: $(uname) (uname)"
+        echo "Got ARCH: $(uname -m) (uname -m)"
+        exit 1
+    fi
+fi
 
 if [ "$OS" = unknown ] || [ "$ARCH" = unknown ]; then
     echo "Couldn't detect your OS and architecture - exiting!"
-    echo "Expected Linux or macOS on x86_64 or i386"
+    echo "Expected Linux or macOS on x86_64 or i386 (or Linux on arm or arm64)"
     echo "Got OS: $(uname) (uname)"
     echo "Got ARCH: $(uname -m) (uname -m)"
     exit 1