try again to fix windows

e2e/smoke/BUILD

@@ -9,4 +9,5 @@ sh_test(
     name = "test",
     srcs = ["proto_descriptor_test.sh"],
     data = ["foo_proto"],
+    deps = ["@bazel_tools//tools/bash/runfiles"],
 )

e2e/smoke/proto_descriptor_test.sh

@@ -1,3 +1,15 @@
 #!/usr/bin/env bash
 
-grep msg $TEST_SRCDIR/$TEST_WORKSPACE/foo_proto-descriptor-set.proto.bin
+# --- begin runfiles.bash initialization v3 ---
+# Copy-pasted from the Bazel Bash runfiles library v3.
+set -uo pipefail; set +e; f=bazel_tools/tools/bash/runfiles/runfiles.bash
+source "${RUNFILES_DIR:-/dev/null}/$f" 2>/dev/null || \
+  source "$(grep -sm1 "^$f " "${RUNFILES_MANIFEST_FILE:-/dev/null}" | cut -f2- -d' ')" 2>/dev/null || \
+  source "$0.runfiles/$f" 2>/dev/null || \
+  source "$(grep -sm1 "^$f " "$0.runfiles_manifest" | cut -f2- -d' ')" 2>/dev/null || \
+  source "$(grep -sm1 "^$f " "$0.exe.runfiles_manifest" | cut -f2- -d' ')" 2>/dev/null || \
+  { echo>&2 "ERROR: cannot find $f"; exit 1; }; f=; set -e
+# --- end runfiles.bash initialization v3 ---
+
+grep msg $(rlocation $TEST_WORKSPACE/foo_proto-descriptor-set.proto.bin)
+