update sick_scan_base

- set branch and update environment variable

data/modules/deps/sick_scan_base.json

@@ -7,7 +7,7 @@
     "git": {
       "ssh_url":"git@github.com:HerrmannTell/sick_scan_base.git",
       "https_url": "https://github.com/HerrmannTell/sick_scan_base.git",
-      "default_checkout_ref": "master"
+      "default_checkout_ref": "librarytarget"
     }
   },
 
@@ -19,6 +19,9 @@
 
     "build": "cmake",
 
+      "install": { "env": { "sick_scan_base_DIR": "$MODULE_PATH" }},
+
+
     "required_modules": {
     "apt/gxx-6": {}
   }