Update syscalls for Linux v5.0 (#11)

Regenerate the list of syscalls based on Linux v5.0.

Author: andrewkroh

arch/mk_syscalls_linux.go

@@ -346,8 +346,8 @@ var (
 )
 
 func init() {
-	flag.StringVar(&outputFile, "-out", "zsyscalls.go", "output file")
-	flag.StringVar(&linuxVersion, "-version", "v4.16", "linux version (git tag)")
+	flag.StringVar(&outputFile, "out", "zsyscalls.go", "output file")
+	flag.StringVar(&linuxVersion, "version", "v5.0", "linux version (git tag)")
 }
 
 func main() {