[Fasta] include source code in dill

pkg/front_end/lib/src/fasta/compiler_command_line.dart

Index: pkg/front_end/lib/src/fasta/compiler_command_line.dart
diff --git a/pkg/front_end/lib/src/fasta/compiler_command_line.dart b/pkg/front_end/lib/src/fasta/compiler_command_line.dart
index 5874bc3dce175c4d45ca069504c87667e8c52603..38f09d759fa1f1d72ea6bc71e3987a048ee417e4 100644
--- a/pkg/front_end/lib/src/fasta/compiler_command_line.dart
+++ b/pkg/front_end/lib/src/fasta/compiler_command_line.dart
@@ -32,6 +32,8 @@ class CompilerCommandLine extends CommandLine {
 
   bool get dumpIr => options.containsKey("--dump-ir");
 
+  bool get includeSource => options.containsKey("--include-source");
+
   bool get help {
     return options.containsKey("--help") ||
         options.containsKey("-h") ||
@@ -167,6 +169,9 @@ Supported options:
   --dump-ir
     Print compiled libraries in Kernel source notation.
 
+  --include-source
+    Include source code in the dill file. Used for debugging.
+
   --compile-sdk=<patched_sdk>
     Compile the SDK from scratch instead of reading it from 'platform.dill'.