SubProcess is used by blkdev.cc only
Signed-off-by: Kefu Chai <kchai@redhat.com>
   ${PROJECT_SOURCE_DIR}/src/common/Graylog.cc
   ${PROJECT_SOURCE_DIR}/src/common/ostream_temp.cc
   ${PROJECT_SOURCE_DIR}/src/common/LogEntry.cc
-  ${PROJECT_SOURCE_DIR}/src/common/SubProcess.cc
   ${PROJECT_SOURCE_DIR}/src/common/TextTable.cc
   ${PROJECT_SOURCE_DIR}/src/common/Thread.cc
   ${PROJECT_SOURCE_DIR}/src/common/PluginRegistry.cc
 
   ${PROJECT_SOURCE_DIR}/src/common/perf_counters_collection.cc
   ${PROJECT_SOURCE_DIR}/src/common/RefCountedObj.cc
   ${PROJECT_SOURCE_DIR}/src/common/shared_mutex_debug.cc
+  ${PROJECT_SOURCE_DIR}/src/common/SubProcess.cc
   ${PROJECT_SOURCE_DIR}/src/common/Throttle.cc
   ${PROJECT_SOURCE_DIR}/src/common/Timer.cc
   ${PROJECT_SOURCE_DIR}/src/common/TrackedOp.cc