Windows: add //tools/... tests to test suite

Add all tests under //tools/... to
//src:all_windows_tests, to run them on Bazel CI.

See https://github.com/bazelbuild/bazel/issues/4292

Closes #5839.

Change-Id: Iae647f561683cc50ef62416c4b834576ae918486
PiperOrigin-RevId: 208167743
diff --git a/tools/bash/BUILD b/tools/bash/BUILD
index 2d0c314..ae28be9 100644
--- a/tools/bash/BUILD
+++ b/tools/bash/BUILD
@@ -19,3 +19,11 @@
     srcs = ["//tools/bash/runfiles:embedded_tools"],
     visibility = ["//tools:__pkg__"],
 )
+
+test_suite(
+    name = "all_windows_tests",
+    tests = [
+        "//tools/bash/runfiles:all_windows_tests",
+    ],
+    visibility = ["//tools:__pkg__"],
+)