[git] Ignore jit-*.dump files

They are generated by running d8 with the '--perf-prof' flag. We never
want to commit them.

R=machenbach@chromium.org

No-Try: true
Change-Id: I1e249142b893b4f4a9c09cc75eb6623680be12f7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1985994Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65596}

.gitignore

@@ -94,6 +94,7 @@ compile_commands.json
 gccauses
 gcsuspects
 gtags.files
+jit-*.dump
 node_modules
 tags
 turbo*.cfg