Make git-clone faster by fetching only the last commit of SU2 and the submodules

Signed-off-by: Martin Tzvetanov Grigorov <[email protected]>

Author: martin-g

build/compileSU2.sh

@@ -44,7 +44,7 @@ if [ ! -z "$branch" ]; then
     mkdir "src"
   fi
   cd "src"
-  git clone --recursive https://github.com/su2code/SU2 $name
+  git clone --recursive --depth=1 --shallow-submodules https://github.com/su2code/SU2 $name
   cd $name
   git config --add remote.origin.fetch '+refs/pull/*/merge:refs/remotes/origin/refs/pull/*/merge'
   git config --add remote.origin.fetch '+refs/heads/*:refs/remotes/origin/refs/heads/*'