fuzz: disable leak-detection for oss-fuzz builds

fuzz: disable leak-detection for oss-fuzz builds

When we are building for OSS-Fuzz, we want to ensure that the fuzzer
targets are actually created, regardless of leaks. Leaks will be
detected by the subsequent tests of the individual fuzz-targets.

Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20240527150001.325565-1-alxndr@bu.edu>
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit 3e964275d65b92075249201c49b39dfb06d08ad4)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>