libtasn1: add test

Closes #35361.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
whereami 1.0 (new formula)
whereami: add 1.0 bottle.
whereami: add HEAD.
libtiff: modernize
libtiff: add test

Closes #35362.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
ffmpeg: add caveats to document AAC encoder switch
llvm: use absolute dylib IDs

Fixes #32566.
llvm: build libcxx when building clang

Fixes #31754.
llvm: bump revision
llvm: update 3.5.0_1 bottle.
llvm: drop manual installation of cmake modules

cmake modules are installed by default since
https://github.com/llvm-mirror/llvm/commit/4c56efbd441d17b61f3e29ee2372e6e460d5a185

Closes #29976.
Merge remote-tracking branch 'upstream/master'