Add compile bcid stage to docs generation.

Not having the compile stage is preventing the provenance generation for
api docs.

Bug: https://github.com/flutter/flutter/issues/117157
Change-Id: I72d8619ca4077d39f3aeb0206a47928b157d0be9
Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/37504
Reviewed-by: Xilai Zhang <xilaizhang@google.com>
Commit-Queue: Godofredo Contreras <godofredoc@google.com>
diff --git a/recipe_modules/adhoc_validation/api.py b/recipe_modules/adhoc_validation/api.py
index 818dcbf..a1b6e9f 100644
--- a/recipe_modules/adhoc_validation/api.py
+++ b/recipe_modules/adhoc_validation/api.py
@@ -73,6 +73,7 @@
           env['LUCI_CI'] = True
 
         with self.m.context(env=env, env_prefixes=env_prefixes):
+          self.m.flutter_bcid.report_stage(BcidStage.COMPILE.value)
           self.m.test_utils.run_test(
             validation,
             [resource_name],