build-unit-test-docker: meson 0.52.0 -> 0.53.2
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 <30fff5198f4d10ca1117e5f3ec82f3b4b8900d81@google.com>

openbmc/openbmc-build-scripts,openbmc/openbmc-build-scripts