[dev.boringcrypto] misc/boring: skip long tests during build.release

In CL 397477 I merged long tests into the built-in cmd/release flow.
Skip them during the boringcrypto release for now; we've never run them
before.

For #51797.

Change-Id: I8d5caa945a2558cd3a311a90be5bfb62ae7b0ace
Reviewed-on: https://go-review.googlesource.com/c/go/+/401338
Run-TryBot: Heschi Kreinick <heschi@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>

misc/boring/build.release

diff --git a/misc/boring/build.release b/misc/boring/build.release
index f421b12..ae08bab 100755
--- a/misc/boring/build.release
+++ b/misc/boring/build.release
@@ -70,7 +70,7 @@
     fi
 }
 shortgo=$(echo "$base" | perl -pe 's/(go\d+\.\d+)(\.\d+|rc\d+)/$1/')
-$dir/release -target linux-amd64 -rev "$commit" -version "$version"
+$dir/release -target linux-amd64 -rev "$commit" -version "$version" -skip_long_tests
 $dir/release -target src -rev "$commit" -version "$version"
 output="$version.linux-amd64.tar.gz"
 ls -l "$output"