tracing with an opt-in by file name (#25895)
Summary:
This basically works a simple filter as you suggested ZolotukhinM
`export PYTORCH_JIT_LOG_LEVEL=guard_elimination` will print all `GRAPH_DUMP` and `GRAPH_UPDATE` statements.
`export PYTORCH_JIT_LOG_LEVEL=>guard_elimination:>alias_analysis` will print all `GRAPH_DUMP`, `GRAPH_UPDATE` **and** `GRAPH_DEBUG` statements in `guard_elimination.cpp` **and** in `alias_analysis.cpp`
Pull Request resolved: https://github.com/pytorch/pytorch/pull/25895
Differential Revision: D17309090
Pulled By: Krovatkin
fbshipit-source-id: 8fa9e67cc9af566b084d66cc15223633fda08444
