Add angle_dx11 back to the manifest

Change-Id: I76659f3daf83cce0e18fbf4a8e8ac345e6db2eb4

default.xml

@@ -73,6 +73,7 @@
   <project path="external/chromium_org/testing/gtest" name="platform/external/chromium_org/testing/gtest" />
   <project path="external/chromium_org/third_party/WebKit" name="platform/external/chromium_org/third_party/WebKit" />
   <project path="external/chromium_org/third_party/angle" name="platform/external/chromium_org/third_party/angle" />
+  <project path="external/chromium_org/third_party/angle_dx11" name="platform/external/chromium_org/third_party/angle_dx11" />
   <project path="external/chromium_org/third_party/brotli/src" name="platform/external/chromium_org/third_party/brotli/src" />
   <project path="external/chromium_org/third_party/eyesfree/src/android/java/src/com/googlecode/eyesfree/braille" name="platform/external/chromium_org/third_party/eyesfree/src/android/java/src/com/googlecode/eyesfree/braille" />
   <project path="external/chromium_org/third_party/freetype" name="platform/external/chromium_org/third_party/freetype" />