Print the diff from the shader analysis golden

Change-Id: I1d747b6562b12f645f40d5adadb740e96fd57c53
Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/41180
Commit-Queue: Zach Anderson <zra@google.com>
Reviewed-by: Dan Field <dnfield@google.com>
diff --git a/recipes/engine/engine_unopt.expected/linux.json b/recipes/engine/engine_unopt.expected/linux.json
index b9323ff..9e6978b 100644
--- a/recipes/engine/engine_unopt.expected/linux.json
+++ b/recipes/engine/engine_unopt.expected/linux.json
@@ -2766,7 +2766,8 @@
       "--before",
       "[CACHE]/builder/src/flutter/impeller/tools/malioc.json",
       "--after",
-      "[CACHE]/builder/src/out/android_debug_unopt/gen/malioc"
+      "[CACHE]/builder/src/out/android_debug_unopt/gen/malioc",
+      "--print-diff"
     ],
     "cwd": "[CACHE]/builder",
     "env": {
diff --git a/recipes/engine/engine_unopt.expected/linux_lto.json b/recipes/engine/engine_unopt.expected/linux_lto.json
index 6fe7bb8..d187647 100644
--- a/recipes/engine/engine_unopt.expected/linux_lto.json
+++ b/recipes/engine/engine_unopt.expected/linux_lto.json
@@ -2763,7 +2763,8 @@
       "--before",
       "[CACHE]/builder/src/flutter/impeller/tools/malioc.json",
       "--after",
-      "[CACHE]/builder/src/out/android_debug_unopt/gen/malioc"
+      "[CACHE]/builder/src/out/android_debug_unopt/gen/malioc",
+      "--print-diff"
     ],
     "cwd": "[CACHE]/builder",
     "env": {
diff --git a/recipes/engine/engine_unopt.py b/recipes/engine/engine_unopt.py
index 1b3244d..b5a70aa 100644
--- a/recipes/engine/engine_unopt.py
+++ b/recipes/engine/engine_unopt.py
@@ -120,7 +120,8 @@
       '--before',
       GetCheckoutPath(api).join('flutter', 'impeller', 'tools', 'malioc.json'),
       '--after',
-      GetCheckoutPath(api).join('out', out_dir, 'gen', 'malioc')
+      GetCheckoutPath(api).join('out', out_dir, 'gen', 'malioc'),
+      '--print-diff'
   ]
   api.step('malioc diff', args)