cmake HAVE_BSEARCH examples

alibaba/AliSQL configure.cmake :490 

CHECK_FUNCTION_EXISTS (bsearch HAVE_BSEARCH)

alibaba/AliSQLBackup configure.cmake :406 

CHECK_FUNCTION_EXISTS (bsearch HAVE_BSEARCH)

gccxml/gccxml GCC/config_cmake/CMakeLists.txt :210 

CHECK_FUNCTION_EXISTS(bsearch HAVE_BSEARCH)