Add layoutlib tests to DIST_DIR [DO NOT MERGE]

Add the layoutlib and layoutlib-create tests to DIST_DIR for sdk
targets. These can be used for continuous testing on the build server.

Change-Id: I747dddcddfd8009937668bec4d75cb99bf63235f
(cherry picked from commit f9c749c9901c459f77ffc6f4fbbc15f4142c6e0a)
2 files changed