cheets: Add external/wayland and external/cheets-libffi
wayland-client will be used by the hardware composer.
libffi is required by libwayland-client.
BUG=b/25324609
TEST=drm_hwcomposer.cpp compiles/links when including "wayland-client.h"
and calling wl_display_connect(NULL)
Change-Id: I2d05e174b5044b11fae798d93ef2fd1090b70f1f
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..876d6e3
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+src/wayland-client-protocol.h
+src/wayland-version.h