DO NOT MERGE: Build a static bspatch for recovery. The recovery image must include only static binary. This patch compiles bspatch as a static binary and installs it in recovery so it can be used by update_engine_sideload. Bug: 27178350 TEST=`mmma external/bsdiff` builds the recovery static file. (cherry picked from commit 4bbeb1a12ddb13f9126015b2a51ae5b9394bcf9b) Change-Id: I25bd1925b7b04434542a29cd23c2542607b46362