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Change filecheck default to dump input on failure

Authored by mehdi_amini on Mar 27 2020, 4:58 PM.

Description

Change filecheck default to dump input on failure

Having the input dumped on failure seems like a better
default: I debugged FileCheck tests for a while without knowing
about this option, which really helps to understand failures.

Remove -dump-input-on-failure and the environment variable
FILECHECK_DUMP_INPUT_ON_FAILURE which are now obsolete.

Differential Revision: https://reviews.llvm.org/D81422