Add dwp_files to rules based toolchain

Copybara Import from https://github.com/bazelbuild/rules_cc/pull/478

BEGIN_PUBLIC
Add dwp_files to rules based toolchain (#478)

This is required for fission to work

Closes #478
END_PUBLIC

COPYBARA_INTEGRATE_REVIEW=https://github.com/bazelbuild/rules_cc/pull/478 from keith:ks/add-dwp_files-to-rules-based-toolchain 29eb58fddc924719fc750c0eed649f8bf27fe9b7
PiperOrigin-RevId: 804587132
Change-Id: Ic6469b3d8287ba936ab56dd4724d1b1edffab191
diff --git a/cc/toolchains/toolchain.bzl b/cc/toolchains/toolchain.bzl
index af8d522..fa41163 100644
--- a/cc/toolchains/toolchain.bzl
+++ b/cc/toolchains/toolchain.bzl
@@ -38,9 +38,11 @@
         Label("//cc/toolchains/actions:cpp_compile"),
         Label("//cc/toolchains/actions:cpp_header_parsing"),
     ],
-    # There are no actions listed for coverage, dwp, and objcopy in action_names.bzl.
+    # There are no actions listed for coverage and objcopy in action_names.bzl.
     "coverage_files": [],
-    "dwp_files": [],
+    "dwp_files": [
+        Label("//cc/toolchains/actions:dwp"),
+    ],
     "linker_files": [
         Label("//cc/toolchains/actions:cpp_link_dynamic_library"),
         Label("//cc/toolchains/actions:cpp_link_nodeps_dynamic_library"),