android: fix msgpack compilation on OSX

Handling of run-path (@rpath) was not working when targeting android.
This rpath is used to link with shared libraries.
This patch disables the shared version of msgpack, since we only use the
static one anyway

Change-Id: I7100ac2a3ef8f1dbff382e0384ba4d5ad6e2b9ad
Tuleap: #534

contrib/src/msgpack/rules.mak

@@ -9,6 +9,7 @@ endif
 
 MSGPACK_CMAKECONF := -DMSGPACK_CXX11=ON \
 		-DMSGPACK_BUILD_EXAMPLES=OFF \
+		-DMSGPACK_ENABLE_SHARED=OFF \
 		-DCMAKE_INSTALL_LIBDIR=lib
 
 $(TARBALLS)/msgpack-c-$(MSGPACK_VERSION).tar.gz: