[apps/bundle_deploy] Link demo_* targets with LDFLAGS and also with -lm. (#6636)
[apps/bundle_deploy] Link demo_* targets with LDFLAGS and also with -lm. (#6636)


dmlc/tvm,dmlc/tvm,sxjscience/tvm,sxjscience/tvm,sxjscience/tvm,sxjscience/tvm,Laurawly/tvm-1,sxjscience/tvm,Laurawly/tvm-1,sxjscience/tvm,tqchen/tvm,sxjscience/tvm,Laurawly/tvm-1,tqchen/tvm,tqchen/tvm,Laurawly/tvm-1,tqchen/tvm,tqchen/tvm,tqchen/tvm,dmlc/tvm,dmlc/tvm,Laurawly/tvm-1,Laurawly/tvm-1,tqchen/tvm,dmlc/tvm,tqchen/tvm,dmlc/tvm,Laurawly/tvm-1,tqchen/tvm,dmlc/tvm,sxjscience/tvm,Laurawly/tvm-1,sxjscience/tvm,dmlc/tvm,Laurawly/tvm-1,dmlc/tvm,tqchen/tvm,Laurawly/tvm-1