libx11-xcb-dev is used by WSI-Window.
libx11-xcb-dev depends on libx11-dev and libxcb1-dev.
So, installing libx11-xcb-dev will install all three.
Change-Id: Id3909919bbd48794df2fcad10b67ea3f8dbb203f
These packages are needed to build this repository:
```
-sudo apt-get install git cmake build-essential bison libx11-dev libxcb1-dev libxkbcommon-dev libmirclient-dev libwayland-dev libxrandr-dev
+sudo apt-get install git cmake build-essential bison libx11-xcb-dev libxkbcommon-dev libmirclient-dev libwayland-dev libxrandr-dev
```
Example debug build (Note that the update\_external\_sources script used below builds external tools into predefined locations. See **Loader and Validation Layer Dependencies** for more information and other options):