Add the analysis options path to the diagnostics page.

pkg/analyzer/lib/src/generated/engine.dart

Index: pkg/analyzer/lib/src/generated/engine.dart
diff --git a/pkg/analyzer/lib/src/generated/engine.dart b/pkg/analyzer/lib/src/generated/engine.dart
index f2f984f3b32b916b0d5a42dadf8c4b41bd600584..4795077dd9ca49e37a3619828b0b2a1277ac782d 100644
--- a/pkg/analyzer/lib/src/generated/engine.dart
+++ b/pkg/analyzer/lib/src/generated/engine.dart
@@ -1290,6 +1290,11 @@ abstract class AnalysisOptions {
   List<Linter> get lintRules;
 
   /**
+   * An informative value for the file path the analysis options were read from.
+   */
+  String get optionsFilePath;
+
+  /**
    * A mapping from Dart SDK library name (e.g. "dart:core") to a list of paths
    * to patch files that should be applied to the library.
    */
@@ -1443,6 +1448,9 @@ class AnalysisOptionsImpl implements AnalysisOptions {
    */
   List<Linter> _lintRules;
 
+  @override
+  String optionsFilePath;
+
   Map<String, List<String>> patchPaths = {};
 
   @override
@@ -1530,6 +1538,7 @@ class AnalysisOptionsImpl implements AnalysisOptions {
     trackCacheDependencies = options.trackCacheDependencies;
     disableCacheFlushing = options.disableCacheFlushing;
     patchPaths = options.patchPaths;
+    optionsFilePath = options.optionsFilePath;
   }
 
   bool get analyzeFunctionBodies {