Fix working directory detection

build_revanced.sh

@@ -103,7 +103,7 @@ if [[ $flag == false && "$2" != "force" ]]; then
 fi
 
 # Download required apk files
-$ODIR/download_apkmirror.sh "$WDIR"
+/bin/bash "$ODIR/download_apkmirror.sh" "$WDIR"
 
 # Fetch microG
 chmod +x apkeep

download_apkmirror.sh

@@ -81,7 +81,7 @@ dl_ytm() {
 
 # Get into the build directory
 
-if [ -z "$1" ]; then
+if [ -d "$1" ]; then
     cd "$1"
 else
     echo "Working directory not provided"