[CI] Fuzzit job is failed by nonexistent directory

[asfimport]

https://circleci.com/gh/ursa-labs/crossbow/5320

+ source_dir=/arrow/cpp
+ build_dir=/arrow/cpp/build
+ pushd /arrow/cpp/build/relwithdebinfo
/arrow/ci/scripts/fuzzit_build.sh: line 26: pushd: /arrow/cpp/build/relwithdebinfo: No such file or directory

Reporter: Kouhei Sutou / @kou
Assignee: Kouhei Sutou / @kou

PRs and other links:

• GitHub Pull Request #5896

_{Note: This issue was originally created as ARROW-7258. Please see the migration documentation for further details.}

[asfimport]

Kouhei Sutou / @kou:
Issue resolved by pull request 5896
#5896