pwkit/cli/latexdriver.py: add feature to emit Makefile-format dependencies
pwkit/cli/latexdriver.py: add feature to emit Makefile-format dependencies

This uses the "-recorder" option provided by the TeXLive binaries to emit the
paths of input files as a Makefile. We can then use this with make or ninja to
get automagical tracking of the full chain of dependent files.

pkgw/pwkit