Add a waiver file for Verible lint

The waiver files currently don't support comments, and require the
"empty" regex; bugs have been filed to get that resolved upstream.

But beyond that, waivers are now functional.

ibex_core.core

@@ -48,6 +48,10 @@ filesets:
     files:
       - lint/verilator_waiver.vlt: {file_type: vlt}
 
+  files_lint_verible:
+    files:
+      - lint/verible_waiver.vbw: {file_type: veribleLintWaiver}
+
   files_check_tool_requirements:
     depend:
      - lowrisc:tool:check_tool_requirements
@@ -132,22 +136,19 @@ parameters:
     description: "Number of PMP regions"
 
 targets:
-  default:
+  default: &default_target
     filesets:
       - tool_verilator ? (files_lint_verilator)
+      - tool_veriblelint ? (files_lint_verible)
       - files_rtl
       - files_check_tool_requirements
+    toplevel: ibex_core
   lint:
-    filesets:
-      - tool_verilator ? (files_lint_verilator)
-      - files_rtl
-      - files_lint
-      - files_check_tool_requirements
+    <<: *default_target
     parameters:
       - SYNTHESIS=true
       - RVFI=true
     default_tool: verilator
-    toplevel: ibex_core
     tools:
       verilator:
         mode: lint-only

lint/verible_waiver.vbw

@@ -0,0 +1 @@
+waive --rule=module-filename --regex=".*" --location="ibex_register_file_.+"