fix config install script (cmake, create dest folder and fix permissions)

cmake/modules/SRSLTE_install_configs.sh.in

@@ -3,29 +3,45 @@
 # Auto-updated by CMake with actual install path
 SRSLTE_INSTALL_DIR="${CMAKE_INSTALL_PREFIX}/${DATA_DIR}"
 
+# Default folder where configs go
+dest_folder="$HOME/.srs"
+
 install_file(){
   source_path="$SRSLTE_INSTALL_DIR/$1"
-  dest_path="$HOME/.srs/${1%.example}" # Strip .example from it
+  dest_path=$(echo "$dest_folder/$1" | sed 's/\.[^.]*$//') # Strip .example from filename
 
   # Check if config file already exists in location
   if [ -f  $dest_path ]; then
-    echo "$dest_path already exists. Skipping it."
+    echo " - $dest_path already exists. Skipping it."
     return
   fi
   
   # Check if config file exists in source location
   if [ -f $source_path ]; then
-    echo "Installing $1 in $dest_path"
+    echo " - Installing $1 in $dest_path"
     cp $source_path $dest_path
+    
+    # Set file ownership to user calling sudo
+    if [ $SUDO_USER ]; then
+      user=$SUDO_USER
+      chown $user:$user $dest_path
+    fi
   else
-    echo "$source_path doesn't exist. Skipping it."
+    echo " - $source_path doesn't exists. Skipping it."
   fi
 
   return
 }
 
 # Install all srsLTE config files
-echo "Installing srsLTE configuration files .."
+echo "Installing srsLTE configuration files:"
+
+# Make sure the target directory exists
+if [ ! -d "$dest_folder" ]; then
+  echo " - Creating srsLTE config folder $dest_folder"
+  mkdir $dest_folder
+fi
+
 
 install_file "ue.conf.example"
 install_file "enb.conf.example"