bazel-orfs: bump to 6ebadeb (yosys/abc 0.64 via custom registry)

Picks up the Kogge-Stone adder memory corruption fix in yosys 0.64
that triggered ABC SIGSEGVs under yosys 0.63 + abc 0.62-yosyshq.

- Bump BAZEL_ORFS_COMMIT to 6ebadeb, which moves yosys to 0.64.
- Drop the vendored render_gds PDK_CONFIGS patch and the now-empty
  patches/bazel-orfs/ directory: the fix landed upstream in bazel-orfs
  commit bfd3a1d ("render_gds: monkey-patch PDK_CONFIGS instead of
  gdsii_use_custom_config"), so the patches= argument and its sole
  entry are no longer needed.
- Mirror bazel-orfs/.bazelrc's --registry= lines into root .bazelrc so
  yosys 0.64 resolves from the unmerged BCR PR (bazelbuild/bazel-
  central-registry#8862) fork until that PR lands. ORFS has its own
  .bazelrc, so bazel-orfs's lines don't propagate automatically.
- abc 0.64-yosyshq.bcr.1 is already on official BCR; only yosys 0.64
  requires the fallback registry.

Local test: bazelisk test //flow/designs/asap7/... --keep_going:
mock-alu (kogge-stone exerciser) PASSES with yosys/abc 0.64.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

Author: oharboe

.bazelrc

@@ -1,3 +1,13 @@
+# yosys 0.64 is not yet in BCR; add the unmerged PR's fork as a fallback
+# registry until bazelbuild/bazel-central-registry#8862 lands.  BCR is
+# listed first so all other modules resolve from the official source;
+# the fork is only consulted for modules/versions BCR doesn't carry yet.
+# The commit hash makes the fork reference immutable.  Mirrors what
+# bazel-orfs/.bazelrc does upstream — ORFS root has its own .bazelrc so
+# the upstream lines don't propagate automatically.
+common --registry=https://bcr.bazel.build/
+common --registry=https://raw.githubusercontent.com/oharboe/bazel-central-registry/0586b398db6edd245da97cbec29e26c5e2a808d7/
+
 build --incompatible_strict_action_env
 build --cxxopt "-std=c++20" --host_cxxopt "-std=c++20"
 

MODULE.bazel

@@ -36,23 +36,14 @@ git_override(
 bazel_dep(name = "bazel-orfs", dev_dependency = True)
 bazel_dep(name = "bazel-orfs-verilog", dev_dependency = True)
 
-BAZEL_ORFS_COMMIT = "3a5ddd7eb48c363717e65903ae4573d528327fd3"
+BAZEL_ORFS_COMMIT = "6ebadeb4be5c9ada103081c9a5e668c014126616"
 
 BAZEL_ORFS_REMOTE = "https://github.com/The-OpenROAD-Project/bazel-orfs.git"
 
 # To bump version, run: bazelisk run @bazel-orfs//:bump
-#
-# `patches =` keeps small bazel-orfs fixes vendored in this repo while
-# we iterate, instead of round-tripping every change through a
-# bazel-orfs PR + pin bump.  When a patch lands upstream, drop the
-# entry here and bump BAZEL_ORFS_COMMIT.
 git_override(
     module_name = "bazel-orfs",
     commit = BAZEL_ORFS_COMMIT,
-    patch_strip = 1,
-    patches = [
-        "//patches/bazel-orfs:0001-render_gds-monkey-patch-PDK_CONFIGS-not-gdsii_use_custom_config.patch",
-    ],
     remote = BAZEL_ORFS_REMOTE,
 )