libtiff: modernize
libtiff: add test

Closes #35362.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
python: pip 6.0.3
python: remove stdenv build support
python3: remove stdenv build support
python3: don't use ensurepip
pypy: pip 6.0.3
pypy: relocate bottle block
pypy: bottle pip and setuptools
pypy3: pip 6.0.3
pypy3: bottle pip and setuptools
setuptools 9.1
pypy: update 2.4.0_2 bottle.
pypy3: update 2.4.0 bottle.
python: update 2.7.9 bottle.
python3: update 3.4.2_1 bottle.