httparse: Add missing fuzzers (#13277)

These fuzzers were not included into OSS-Fuzz project

Author: tyler92

projects/httparse/build.sh

@@ -20,3 +20,6 @@ cargo fuzz build -O
 cp fuzz/target/x86_64-unknown-linux-gnu/release/parse_request $OUT/
 cp fuzz/target/x86_64-unknown-linux-gnu/release/parse_headers $OUT/
 cp fuzz/target/x86_64-unknown-linux-gnu/release/parse_chunk_size $OUT/
+cp fuzz/target/x86_64-unknown-linux-gnu/release/parse_response $OUT/
+cp fuzz/target/x86_64-unknown-linux-gnu/release/parse_request_multspaces $OUT/
+cp fuzz/target/x86_64-unknown-linux-gnu/release/parse_response_multspaces $OUT/