scripts/build-unit-test-docker: mapper + meson

Patches to remove autotools support from the mapper are in progress.
Switch to meson to prepare for that eventuality.

Change-Id: I21662fdd3f2f2af545c0aeecd12a51e817ca97fb
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/scripts/build-unit-test-docker b/scripts/build-unit-test-docker
index a6ef62c..fa2c5bf 100755
--- a/scripts/build-unit-test-docker
+++ b/scripts/build-unit-test-docker
@@ -234,7 +234,10 @@
             "openbmc/phosphor-logging",
             "openbmc/sdbusplus",
         ],
-        build_type="autoconf",
+        build_type="meson",
+        config_flags=[
+            "-Dtests=disabled",
+        ],
     ),
     "openbmc/pldm": PackageDef(
         depends=[