Merge pull request #4669 from willmmiles/4597-usermods-not-building

Correct issues with usermods not being linked.
- Explicitly set libArchive: false in usermod library.json files
- Fix up symlink path generation on Windows
- Add validation script to report usermod linkage in resulting binary

usermods/usermod_v2_rotary_encoder_ui_ALT/library.json

@@ -1,6 +1,7 @@
 {
   "name": "rotary_encoder_ui_ALT",
   "build": {
+    "libArchive": false,
     "extraScript": "setup_deps.py"
   }
 }

usermods/usermod_v2_rotary_encoder_ui_ALT/setup_deps.py

@@ -1,8 +1,8 @@
+from platformio.package.meta import PackageSpec
 Import('env')
 
-
-usermods = env.GetProjectOption("custom_usermods","").split()
+libs = [PackageSpec(lib).name for lib in env.GetProjectOption("lib_deps",[])]
 # Check for partner usermod
 # Allow both "usermod_v2" and unqualified syntax
-if any(mod in ("four_line_display_ALT", "usermod_v2_four_line_display_ALT") for mod in usermods):
+if any(mod in ("four_line_display_ALT", "usermod_v2_four_line_display_ALT") for mod in libs):
     env.Append(CPPDEFINES=[("USERMOD_FOUR_LINE_DISPLAY")])