Fix tests

Author: hoodmane

src/library_syscall.js

@@ -42,7 +42,7 @@ var SyscallsLibrary = {
     },
     // When called by stat, arg is a path. When called by fstat, arg is a file
     // descriptor.
-    writeStat(buf, statResult) {
+    writeStat(buf, stat) {
       {{{ makeSetValue('buf', C_STRUCTS.stat.st_dev, 'stat.dev', 'i32') }}};
       {{{ makeSetValue('buf', C_STRUCTS.stat.st_mode, 'stat.mode', 'i32') }}};
       {{{ makeSetValue('buf', C_STRUCTS.stat.st_nlink, 'stat.nlink', SIZE_TYPE) }}};