fix: improve build template to make include errors less likely

Author: simonresch

cifuzz-spark/CMakeLists.txt

@@ -1,12 +1,14 @@
 # cifuzz:build-template:begin
 # add_fuzz_test({{ .FuzzTestName }} {{ .FileName }})
 # target_link_libraries({{ .FuzzTestName }} PRIVATE "$<LINK_LIBRARY:WHOLE_ARCHIVE,c-ci::cci_static>")
+# target_compile_definitions({{ .FuzzTestName }} PRIVATE HAVE_CONFIG_H=1)
 # target_include_directories({{ .FuzzTestName }}
 #     PRIVATE "${PROJECT_BINARY_DIR}"
 #             "${PROJECT_BINARY_DIR}/src/lib"
 #             "${PROJECT_SOURCE_DIR}"
 #             "${PROJECT_SOURCE_DIR}/src/lib"
 #             "${PROJECT_SOURCE_DIR}/src/lib/include"
 #             "${PROJECT_SOURCE_DIR}/include"
+#             "${PROJECT_SOURCE_DIR}/test"
 # )
 # cifuzz:build-template:end