Extend examples list with c/cpp/h extensions

docs/librarymanager/config.rst

@@ -372,6 +372,9 @@ A list of example patterns. This field is predefined with default value:
 .. code-block:: javascript
 
     "examples": [
+        "[Ee]xamples/*/*.c",
+        "[Ee]xamples/*/*.cpp",
+        "[Ee]xamples/*/*.h",
         "[Ee]xamples/*/*.ino",
         "[Ee]xamples/*/*.pde"
     ]