misc/capnproto: patch to avoid monotonic time checks

From time to time, our KVM's CI machine clock goes in a weird direction
during NixOS tests, this is known on certain hardware, e.g. macOS, where
the check is disabled. Cap'n'Proto removed the check everywhere now.

Fixes fj#754.

We can remove the patch once it hits a stable version of Cap'n'Proto.

Change-Id: I4c9be5061c3b244f601486a8ac4521dff44ceb92
Signed-off-by: Raito Bezarius <raito@lix.systems>

misc/pre-commit.nix

@@ -51,6 +51,7 @@ pre-commit-run {
       excludes = [
         "\\.drv$"
         "^tests/functional/lang/"
+        ''\.patch$''
       ];
     };
     mixed-line-endings = {
@@ -107,7 +108,10 @@ pre-commit-run {
     trim-trailing-whitespace = {
       enable = true;
       stages = [ "pre-commit" ];
-      excludes = [ "^tests/functional/lang/" ];
+      excludes = [
+        ''^tests/functional/lang/''
+        ''\.patch$''
+      ];
     };
     treefmt = {
       enable = true;