[libvpx] Add zip file for fuzzer seed file (#2025)

Modify build.sh to copy file to output for processing

projects/libvpx/Dockerfile

@@ -18,5 +18,6 @@ FROM gcr.io/oss-fuzz-base/base-builder
 MAINTAINER jzern@google.com
 RUN apt-get update && apt-get install -y yasm wget gcc
 RUN git clone https://chromium.googlesource.com/webm/libvpx
+ADD https://storage.googleapis.com/downloads.webmproject.org/test_data/fuzzer/vpx_fuzzer_seed_corpus.zip $SRC/
 COPY build.sh vpx_dec_fuzzer.dict $SRC/
 WORKDIR libvpx

projects/libvpx/build.sh

@@ -54,6 +54,6 @@ for decoder in "${fuzzer_decoders[@]}"; do
     $SRC/libvpx/examples/${fuzzer_src_name}.cc -o $OUT/${fuzzer_name} \
     ${build_dir}/libvpx.a ${build_dir}/tools_common.c.o \
     -Wl,--end-group
-
+  cp $SRC/vpx_fuzzer_seed_corpus.zip $OUT/${fuzzer_name}_seed_corpus.zip
   cp $SRC/vpx_dec_fuzzer.dict $OUT/${fuzzer_name}.dict
 done