translator: fix a typo in comment

Change-Id: Ibfd39bc478c4e9ddf40138ccf6bd37f247f83632
Reviewed-on: https://chromium-review.googlesource.com/413036
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

CONTRIBUTORS

@@ -69,6 +69,7 @@ Intel Corporation
  Jie Chen
  Qiankun Miao
  Bryan Bernhart
+ Yunchao He
 
 Klarälvdalens Datakonsult AB
  Milian Wolff

src/compiler/translator/Compiler.cpp

@@ -120,7 +120,7 @@ bool RemoveInvariant(sh::GLenum shaderType,
 
 size_t GetGlobalMaxTokenSize(ShShaderSpec spec)
 {
-    // WebGL defines a max token legnth of 256, while ES2 leaves max token
+    // WebGL defines a max token length of 256, while ES2 leaves max token
     // size undefined. ES3 defines a max size of 1024 characters.
     switch (spec)
     {