fio: add run_tests.sh (#13599)

Adds run_tests.sh to the fio project.

run_tests.sh is used as part of Chronos with cached builds:
https://github.com/google/oss-fuzz/tree/master/infra/experimental/chronos#check-tests

`infra/experimental/chronos/check_tests.sh fio c`

```
...
Run Summary:    Type  Total    Ran Passed Failed Inactive                                                                                                 
              suites      7      7    n/a      0        0                    
               tests     16     16     16      0        0                    
             asserts     63     63     63      0      n/a                    
                                                                             
Elapsed time =    0.000 seconds
```

Signed-off-by: Adam Korczynski <adam@adalogics.com>

Author: AdamKorcz

projects/fio/Dockerfile

@@ -15,7 +15,7 @@
 ################################################################################
 
 FROM gcr.io/oss-fuzz-base/base-builder
-RUN apt-get update && apt-get install -y make
+RUN apt-get update && apt-get install -y make libcunit1 libcunit1-dev
 RUN git clone --depth 1 https://github.com/axboe/fio.git fio
 WORKDIR $SRC/fio
-COPY build.sh $SRC/
+COPY build.sh run_tests.sh $SRC/

projects/fio/build.sh

@@ -19,6 +19,7 @@
 export LDFLAGS="$CXXFLAGS"
 ./configure
 make -j$(nproc)
+make unittests/unittest
 cp t/fuzz/fuzz_parseini $OUT/
 
 # builds corpus

projects/fio/run_tests.sh

@@ -0,0 +1,18 @@
+#!/bin/bash -eu
+# Copyright 2025 Google LLC.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+################################################################################
+export ASAN_OPTIONS="detect_leaks=0"
+./unittests/unittest