[HTE @ clang-tidy] Enable clang-tidy configs inheretence for caffe2 project
Summary:
The primary HTE configuration (for `HTE@clang-tidy` project) is stored at the parent config `~/fbsource/fbcode.clang-tidy`. The diff enables inheretence of that configuration.
Note: `facebook-hte-` checks will not be used until switch to HTE2clang-tidy be made.
Note: `clang-diagnostic-*` will start work. As result clang warning messages can be dublicated: one time from HTE and another time from clang-diagnostic
Test Plan: N/A
Reviewed By: wfarner
Differential Revision: D24099167
fbshipit-source-id: 2e092fe678ad3e53a4cef301ce1cb737cf8401e7
