change shape for conv and unary ops (#25477)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/25477
We want to increase `in_c, out_c` so that the metric reported back are more stable
Test Plan:
```[huaminli@devvm2388.ftw3 ~/fbsource/fbcode] buck run mode/dev-nosan caffe2/benchmarks/operator_benchmark:benchmark_all_test -- --operators None --iterations 3
```
runs fine on my devserver, last couple lines of output P107448746
Reviewed By: mingzhe09088
Differential Revision: D17133043
fbshipit-source-id: 0b989a530cbfe3d608471a30ae4bbda10e5216ea
