Merge "Fix the comment for find-test-data-in-subdirs."

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## Find test data in a form required by LOCAL_TEST_DATA

## $(1): the base dir, relative to the root of the source tree.

## $(3): the file name pattern to be passed to find as "-name"

## $(2): a list of subdirs of the base dir

## $(2): the file name pattern to be passed to find as "-name"

## $(3): a list of subdirs of the base dir

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define find-test-data-in-subdirs