use bthread for multi-thread pipeline

BCLOUD

@@ -35,7 +35,7 @@ CONFIGS('baidu/third-party/pybind11@v2.2.4@git_branch')
 CONFIGS('baidu/third-party/python@gcc482output@git_branch')
 CONFIGS('baidu/third-party/yaml-cpp@yaml-cpp_0-6-2-0_GEN_PD_BL@git_tag')
 CONFIGS('baidu/third-party/openmpi@openmpi_1-4-5-0-feed_mlarch@git_branch')
-CONFIGS('baidu/paddlepaddle/pslib@expt-feed-trainer@git_branch')
+CONFIGS('baidu/paddlepaddle/pslib@no_abacus_in_proto@git_branch')
 CONFIGS('third-64/gtest@base')
 HEADERS('paddle/fluid/memory/*.h', '$INC/paddle/fluid/memory/')
 HEADERS('paddle/fluid/memory/detail/*.h', '$INC/paddle/fluid/memory/detail/')