Bug#1046260 CentOS builds: "no debugging symbols found"

Bug#1046260 CentOS builds: "no debugging symbols found"
Do not strip the binary in rpmbuild.

See http://public.kitware.com/Bug/view.php?id=7435

cmake/tarantool_cpack.cmake

@@ -16,6 +16,7 @@ stored procedures in Lua.")
     set (CPACK_RPM_PACKAGE_SUMMARY "Tarantool/Box - an efficient in-memory data store")
     set (CPACK_RPM_PACKAGE_GROUP "Databases")
     set (CPACK_RPM_POST_INSTALL_SCRIPT_FILE "${CMAKE_SOURCE_DIR}/cmake/rpm_post_install.sh")
+    set (CPACK_RPM_SPEC_INSTALL_POST /bin/true)
     set (CPACK_SET_DESTDIR "ON") 
     set (CPACK_INSTALL_PREFIX "${CMAKE_INSTALL_PREFIX}")
 else()