Update package lookup to check for files named BUILD.bazel before files named
BUILD.

Fixes #552.

RELNOTES[NEW]: Packages are defined in BUILD.bazel as well as BUILD files.

--
MOS_MIGRATED_REVID=138828981
diff --git a/src/test/java/com/google/devtools/build/lib/skyframe/FileFunctionTest.java b/src/test/java/com/google/devtools/build/lib/skyframe/FileFunctionTest.java
index 6de849a..91dbc6c 100644
--- a/src/test/java/com/google/devtools/build/lib/skyframe/FileFunctionTest.java
+++ b/src/test/java/com/google/devtools/build/lib/skyframe/FileFunctionTest.java
@@ -42,6 +42,7 @@
 import com.google.devtools.build.lib.pkgcache.PathPackageLocator;
 import com.google.devtools.build.lib.skyframe.ExternalFilesHelper.ExternalFileAction;
 import com.google.devtools.build.lib.skyframe.PackageLookupFunction.CrossRepositoryLabelViolationStrategy;
+import com.google.devtools.build.lib.skyframe.PackageLookupValue.BuildFileName;
 import com.google.devtools.build.lib.testutil.ManualClock;
 import com.google.devtools.build.lib.testutil.TestConstants;
 import com.google.devtools.build.lib.testutil.TestRuleClassProvider;
@@ -145,7 +146,8 @@
                     SkyFunctions.PACKAGE_LOOKUP,
                     new PackageLookupFunction(
                         new AtomicReference<>(ImmutableSet.<PackageIdentifier>of()),
-                        CrossRepositoryLabelViolationStrategy.ERROR))
+                        CrossRepositoryLabelViolationStrategy.ERROR,
+                        ImmutableList.of(BuildFileName.BUILD_DOT_BAZEL, BuildFileName.BUILD)))
                 .put(
                     SkyFunctions.WORKSPACE_AST,
                     new WorkspaceASTFunction(TestRuleClassProvider.getRuleClassProvider()))