cfl: change base path to a seed corpus and dicts

The ClusterFuzzLite uses a Git repo for storing corpora.
The corpus have to be uploaded in the repository under the folder
`/corpus/<fuzz_target>/` for each fuzzer, see [1]. But CTest and
ClusterFuzzLite build script used seed corpus under the folder
`/<fuzz_target>/`, and uploaded corpora was not used by following
ClusterFuzzLite runs. The patch fixes location of the seed corpus
used by CTest and ClusterFuzzLite build script.

1. https://google.github.io/clusterfuzzlite/running-clusterfuzzlite/github-actions/#storage-repo

Author: ligurio

.clusterfuzzlite/build.sh

@@ -54,7 +54,7 @@ git config --global --add safe.directory '*'
 cmake "${cmake_args[@]}" -S . -B build -G Ninja
 cmake --build build --parallel
 
-cp corpus/*.dict corpus/*.options $OUT/
+cp corpus/corpus/*.dict corpus/corpus/*.options $OUT/
 
 # Copy the fuzzer executables, zip-ed corpora, option and
 # dictionary files to $OUT.
@@ -70,7 +70,7 @@ for f in $(find build/tests/ -name '*_test' -type f);
 do
   name=$(basename $f);
   module=$(echo $name | sed 's/_test//')
-  corpus_dir="corpus/$module"
+  corpus_dir="corpus/corpus/$name"
   echo "Copying for $module";
   cp $f $OUT/
   if [ -e "$corpus_dir" ]; then

tests/capi/CMakeLists.txt

@@ -66,6 +66,11 @@ string(JOIN " " LIBFUZZER_OPTS
   -use_value_profile=1
 )
 
+set(CORPUS_BASE_PATH ${PROJECT_SOURCE_DIR}/corpus)
+if(USE_LUAJIT)
+  set(CORPUS_BASE_PATH ${CORPUS_BASE_PATH}/corpus)
+endif()
+
 function(create_test)
   cmake_parse_arguments(
     FUZZ
@@ -89,8 +94,11 @@ function(create_test)
   if (IS_LUAJIT AND (${test_name} STREQUAL "lua_load_test"))
     set(LIBFUZZER_OPTS "${LIBFUZZER_OPTS} -only_ascii=1")
   endif ()
-  set(dict_path ${PROJECT_SOURCE_DIR}/corpus/${test_name}.dict)
-  set(corpus_path ${PROJECT_SOURCE_DIR}/corpus/${test_prefix})
+  set(dict_path ${CORPUS_BASE_PATH}/${test_name}.dict)
+  set(corpus_path ${CORPUS_BASE_PATH}/${test_prefix})
+  if(USE_LUAJIT)
+    set(corpus_path ${CORPUS_BASE_PATH}/${test_name})
+  endif()
   if (EXISTS ${dict_path})
     set(LIBFUZZER_OPTS "${LIBFUZZER_OPTS} -dict=${dict_path}")
   endif ()