Update setup.bash to work on Marvell arm64 OS

setup.bash

@@ -95,7 +95,7 @@ elif [ "$(uname | grep -i 'Linux')" ]; then
     exit 1
   fi
 
-  if [ -n "$(arch | grep 64)" ]; then
+  if [ -n "$(uname -a | grep 64)" ]; then
     ARCH="64"
   else
     ARCH="32"
@@ -117,6 +117,8 @@ elif [ "$(uname | grep -i 'Linux')" ]; then
     OS='raspbian'
   elif [ "$(cat /etc/issue | grep -i 'Fedora')" ]; then
     OS='fedora'
+  elif [ "$(cat /etc/issue | grep -i 'Marvell')" ]; then
+    OS='marvell'
   fi
 else
   echo "unsupported unknown os (non-mac, non-linux)"
@@ -134,6 +136,9 @@ case "${OS}" in
   raspbian)
     SETUP_FILE="ubuntu"
     ;;
+  marvell)
+    SETUP_FILE="ubuntu"
+    ;;    
   yosemite)
     # mavericks
     SETUP_FILE="mavericks"