Add a bazel-srcs target to the top-level package containing all Bazel sources

This target include all non tests targets of Bazel to do integration tests of
bootstrapping.

--
MOS_MIGRATED_REVID=115830741
diff --git a/src/BUILD b/src/BUILD
index 9723aa8..39c8155 100644
--- a/src/BUILD
+++ b/src/BUILD
@@ -217,3 +217,43 @@
     values = {"cpu": "x64_windows"},
     visibility = ["//visibility:public"],
 )
+
+filegroup(
+    name = "srcs",
+    srcs = glob(["**"]) + [
+        "//src/java_tools/buildjar:srcs",
+        "//src/java_tools/junitrunner/java/com/google/testing/junit/junit4:srcs",
+        "//src/java_tools/junitrunner/java/com/google/testing/junit/runner:srcs",
+        "//src/java_tools/junitrunner/java/com/google/testing/junit/runner/internal:srcs",
+        "//src/java_tools/junitrunner/java/com/google/testing/junit/runner/junit4:srcs",
+        "//src/java_tools/junitrunner/java/com/google/testing/junit/runner/model:srcs",
+        "//src/java_tools/junitrunner/java/com/google/testing/junit/runner/sharding:srcs",
+        "//src/java_tools/junitrunner/java/com/google/testing/junit/runner/sharding/api:srcs",
+        "//src/java_tools/junitrunner/java/com/google/testing/junit/runner/sharding/testing:srcs",
+        "//src/java_tools/junitrunner/java/com/google/testing/junit/runner/util:srcs",
+        "//src/java_tools/singlejar:srcs",
+        "//src/main/cpp:srcs",
+        "//src/main/java/com/google/devtools/build/docgen:srcs",
+        "//src/main/java/com/google/devtools/build/lib:srcs",
+        "//src/main/java/com/google/devtools/build/skyframe:srcs",
+        "//src/main/java/com/google/devtools/common/options:srcs",
+        "//src/main/native:srcs",
+        "//src/main/protobuf:srcs",
+        "//src/main/tools:srcs",
+        "//src/objc_tools/bundlemerge:srcs",
+        "//src/objc_tools/plmerge:srcs",
+        "//src/objc_tools/xcodegen:srcs",
+        "//src/tools/android/java/com/google/devtools/build/android:srcs",
+        "//src/tools/generate_workspace:srcs",
+        "//src/tools/xcode/actoolwrapper:srcs",
+        "//src/tools/xcode/environment:srcs",
+        "//src/tools/xcode/ibtoolwrapper:srcs",
+        "//src/tools/xcode/momcwrapper:srcs",
+        "//src/tools/xcode/realpath:srcs",
+        "//src/tools/xcode/stdredirect:srcs",
+        "//src/tools/xcode/swiftstdlibtoolwrapper:srcs",
+        "//src/tools/xcode/xcrunwrapper:srcs",
+        "//src/tools/xcode-common:srcs",
+    ],
+    visibility = ["//:__pkg__"],
+)