fix mach-o file crash

$ file embedded/rgloader/rgloader.darwin.bundle
embedded/rgloader/rgloader.darwin.bundle: Mach-O universal binary with 3 architectures: [ I386: Mach-O i386 bundle ] [ X86_64: Mach-O 64-bit x86_64 bundle ] [ : Mach-O ppc bundle ] [ ]
$ rpm -q file
file-5.13-1.1.x86_64