meson: Upgdate 0.50.1 -> 0.52.0

Our bitbake tree already has this version, bump our script version to
match.

The way scan-build is detected has changed. We no longer need to pass
our custom version of scan-build since it will now be autodetected at
the highest version correctly.

Change-Id: I248875292a385ae05d27f50e2de2e14c0e848aff
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/build-unit-test-docker.sh b/build-unit-test-docker.sh
index 0e45f95..1599d0d 100755
--- a/build-unit-test-docker.sh
+++ b/build-unit-test-docker.sh
@@ -243,7 +243,7 @@
 
 RUN pip install inflection
 RUN pip install pycodestyle
-RUN pip3 install meson==0.50.1
+RUN pip3 install meson==0.52.0
 
 FROM openbmc-base as openbmc-lcov
 RUN curl -L https://github.com/linux-test-project/lcov/archive/${PKG_REV['lcov']}.tar.gz | tar -xz && \