Add recipe to build leveldb library

Added recipe to build leveldb library and patch for leveldb Makefile.
Patch fix bug with leveldb Makefile variable quotes.

Open-webOS-DCO-1.0-Signed-off-by: Maksym Sditanov <msditanov@luxoft.com>

Change-Id: I04cbc8a1707a7b297f58877750ad68236db88efb
Reviewed-on: http://g2g.palm.com/1448
Reviewed-by: Maksym Sditanov <msditanov@luxoft.com>
Tested-by: Maksym Sditanov <msditanov@luxoft.com>
Reviewed-by: Build Verification
Reviewed-by: Roger Stringer <roger.stringer@palm.com>
Reviewed-by: Keith Derrick <keith.derrick@palm.com>