Update compile kernel script

img-kernel-utils/scripts/vm-scripts/compile-kernel

 #!/bin/bash
 
 usage() {
-  echo "Usage: $0 [-hdkms] [-l LINUX_PATH] [-o OUTPUT_STR] (-p | -u CONFIG_PATH | -c CONFIG_PATH | -n OLD_CONFIG_PATH NEW_CONFIG_PATH)"
+  echo "Usage: $0 [-hgdkms] [-l LINUX_PATH] [-o OUTPUT_STR | -O OUTPUT_NAME] (-p | -u CONFIG_PATH | -c CONFIG_PATH | -n OLD_CONFIG_PATH NEW_CONFIG_PATH)"
   exit 1;
 }
 
 linux_path=$HOME/linux
 output_str=""
 
-while getopts "hdkmpsu:c:nl:o:" opt; do
+while getopts "hgdkmpsu:c:nl:o:O:" opt; do
   case "${opt}" in
     h )
         usage
         ;;
+    g )
+        update_git=1
+        ;;
     s )
         copy_to_sepia=1
         ;;
@@ -52,6 +55,9 @@ while getopts "hdkmpsu:c:nl:o:" opt; do
     o )
         output_str="_${OPTARG}"
         ;;
+    O )
+        output_name="${OPTARG}"
+        ;;
     * )
         usage
       ;;
@@ -70,6 +76,10 @@ linux_path=$(readlink -m $linux_path)
 export ARCH=arm;export CROSS_COMPILE=arm-linux-gnueabihf-;
 cd $linux_path;
 
+if [ -n "$update_git" ]; then
+  git pull;
+fi
+
 if [ -z "$partial_compile" ]; then
   if [ -n "${new_config}" ]; then
   
@@ -133,7 +143,9 @@ fi
 # Compression
 
 kernel_version=$(git describe --tags)
-output_name=${kernel_version}_kernel${output_str}
+if [ -z "$output_name" ]; then
+  output_name=${kernel_version}_kernel${output_str}
+fi
 
 echo "Creating output folder";
 mkdir -p ../$output_name;