The main build hasn't swtiched to java 8, but lambdas are already used
in layoutlib. This fixes the build break.
Change-Id: I4dd69ebd736179067899f5d86d3608d5fdb03d93
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