Enable asm compilation in libjpeg_turbo on Linux.

build/secondary/third_party/libjpeg_turbo/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Do not use the targets in this file unless you need a certain libjpeg
 # implementation. Use the meta target //third_party:jpeg instead.
 
 if (current_cpu == "arm") {
   import("//build/config/arm.gni")
 }
@@ skipping 180 matching lines @@
     "MOTION_JPEG_SUPPORTED",
     "NO_GETENV",
   ]
 
   configs += [ ":libjpeg_config" ]
 
   public_configs = [ ":libjpeg_config" ]
 
   # MemorySanitizer doesn't support assembly code, so keep it disabled in
   # MSan builds for now.
-  # TODO: Enable on Linux when .asm files are recognized.
-  if (is_msan || is_linux) {
+  if (is_msan) {
     sources += [ "jsimd_none.c" ]
   } else {
     deps = [
       ":simd",
     ]
   }
-
-  # TODO(GYP): Compile the .asm files with YASM as GYP does.
 }