Fix trailing slashes in detected path

Trailing slashes cause the detection of the grantlee5 version to fail
with an empty string, causing deployment to go to the wrong directory
(the parent dir of the actual directory).

Author: TheAssassin

grantlee5/linuxdeploy-plugin-grantlee5.sh

@@ -117,7 +117,7 @@ fi
 
 # guess grantlee version from the plugin path
 # this should always be the last component, as the plugins need to be stored in a directory like .../grantlee/<version>/grantlee*.so
-grantlee5_version="$(echo "$GRANTLEE5_PLUGINS_DIR" | rev | cut -d/ -f1 | rev)"
+grantlee5_version="$(echo "$GRANTLEE5_PLUGINS_DIR" | sed -e 's|/*$||' | rev | cut -d/ -f1 | rev)"
 
 if [[ "$grantlee5_version" == "" ]]; then
     echo "Error: failed to detect grantlee5 version"