Move oss-fuzz build script to the repo

Tests/Fuzzers/default.options

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+[libfuzzer]
+close_fd_mask=3

Tests/Fuzzers/ossfuzz.sh

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+TARGETS_DIR=build/
+
+# Build libpcap
+cd $SRC/libpcap/
+./autogen.sh
+./configure --enable-shared=no
+make -j$(nproc)
+
+# Build PcapPlusPlus linking statically against the built libpcap
+cd $SRC/PcapPlusPlus
+LIBPCAP_PATH=$SRC/libpcap/
+cmake -DPCAPPP_BUILD_FUZZERS=ON -DPCAPPP_BUILD_TESTS=OFF -DPCAPPP_BUILD_EXAMPLES=OFF -DPCAP_INCLUDE_DIR="${LIBPCAP_PATH}/" -DPCAP_LIBRARY="${LIBPCAP_PATH}/libpcap.a" -S . -B $TARGETS_DIR
+cmake --build $TARGETS_DIR -j
+
+# Copy target and options
+FUZZERS="
+    FuzzTarget \
+    FuzzTargetNg \
+    FuzzTargetSnoop \
+    FuzzWriter \
+    FuzzWriterNg"
+
+for fuzzer in $FUZZERS; do
+    cp $TARGETS_DIR/Tests/Fuzzers/${fuzzer} $OUT
+    cp $(ldd $OUT/${fuzzer} | cut -d" " -f3) $OUT
+    cp Tests/Fuzzers/default.options $OUT/${fuzzer}.options
+done
+
+# Copy corpora
+find $SRC/ -iname "*.pcap"   | xargs zip $OUT/FuzzTarget_seed_corpus.zip
+find $SRC/ -iname "*.pcapng" | xargs zip $OUT/FuzzTargetNg_seed_corpus.zip
+find $SRC/ -iname "*.snoop"  | xargs zip $OUT/FuzzTargetSnoop_seed_corpus.zip
+find $SRC/ -iname "*.pcap"   | xargs zip $OUT/FuzzWriter_seed_corpus.zip
+find $SRC/ -iname "*.pcapng" | xargs zip $OUT/FuzzWriterNg_seed_corpus.zip