hfuzz: separate _workspace and _input directories, add workspace to .gitignore

.gitignore

@@ -1,6 +1,10 @@
 target
 Cargo.lock
 
+#fuzz
+fuzz/hfuzz_target
+fuzz/hfuzz_workspace
+
 #IntelliJ project files
 .idea
 *.iml

fuzz/travis-fuzz.sh

@@ -4,7 +4,11 @@ cargo install --force honggfuzz
 for TARGET in fuzz_targets/*; do
     FILENAME=$(basename $TARGET)
 	FILE="${FILENAME%.*}"
-	HFUZZ_BUILD_ARGS="--features honggfuzz_fuzz" HFUZZ_RUN_ARGS="-N1000000 --exit_upon_crash -v" cargo hfuzz run $FILE
+	if [ -d hfuzz_input/$FILE ]; then
+	    HFUZZ_INPUT_ARGS="-f hfuzz_input/$FILE/input"
+	fi
+	HFUZZ_BUILD_ARGS="--features honggfuzz_fuzz" HFUZZ_RUN_ARGS="-N1000000 --exit_upon_crash -v $HFUZZ_INPUT_ARGS" cargo hfuzz run $FILE
+
 	if [ -f hfuzz_workspace/$FILE/HONGGFUZZ.REPORT.TXT ]; then
 		cat hfuzz_workspace/$FILE/HONGGFUZZ.REPORT.TXT
 		for CASE in hfuzz_workspace/$FILE/SIG*; do