MacOS.locate: search HOMEBREW_PREFIX before xcrun

Since xcrun doesn't work on CLT-only systems. Querying HOMEBREW_PREFIX
first before xcrun is much faster for that case.
mysql: update bottles.
tbb 4.1u4

Closes #21483.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
varnish 3.0.4

Closes #21474.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>