HDFS-5482. DistributedFileSystem#listPathBasedCacheDirectives must support relative paths. Contributed by Colin Patrick McCabe.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1540257 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10088. copy-nativedistlibs.sh needs to quote snappy lib dir. Contributed by Raja Aluri.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1540270 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-HDFS-4311-INVESTIGATION-trunk-gd