doc: remove eu-strip from tarball

This is been removed because of this:
the source is not provided
it adds 105ko of useless files
It's only used in the android and fuchsia GN builds

Fixes: #20280

PR-URL: #20304
Fixes: #20280
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Matheus Marchini <matheus@sthima.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

.gitignore

@@ -127,3 +127,4 @@ deps/v8/src/Debug/
 deps/v8/src/Release/
 deps/v8/src/inspector/Debug/
 deps/v8/src/inspector/Release/
+deps/v8/third_party/eu-strip/