libplist: Add JSON fuzzer (#7182)

Author: nikias

projects/libplist/build.sh

@@ -20,13 +20,14 @@
 make -j$(nproc) clean
 make -j$(nproc) all
 
-for fuzzer in bplist_fuzzer xplist_fuzzer; do
+for fuzzer in bplist_fuzzer xplist_fuzzer jplist_fuzzer; do
   $CXX $CXXFLAGS -std=c++11 -Iinclude/ \
       fuzz/$fuzzer.cc -o $OUT/$fuzzer \
       $LIB_FUZZING_ENGINE src/.libs/libplist-2.0.a
 done
 
 zip -j $OUT/bplist_fuzzer_seed_corpus.zip test/data/*.bplist
 zip -j $OUT/xplist_fuzzer_seed_corpus.zip test/data/*.plist
+zip -j $OUT/jplist_fuzzer_seed_corpus.zip test/data/*.json
 
 cp fuzz/*.dict fuzz/*.options $OUT/