build-unit-test-docker: meson 0.52.0 -> 0.53.2

This picks up fixes from upstream that we need to better support
subprojects in our repositories.

Change-Id: I103f1cd68d0899041d4a687b3a658068445d8834
Signed-off-by: William A. Kennington III <wak@google.com>
1 file changed