meson: Format build files with `meson format`

Additionally, add the formatting command to `scripts/pre-submit` so it's
run by OpenBMC's CI (via `scripts/run-ci`).

Change-Id: Ifb8fc06106b8cfa9155e986528b769a5ca450b4c
Signed-off-by: Andrew Jeffery <andrew@codeconstruct.com.au>
diff --git a/tests/oem/ibm/meson.build b/tests/oem/ibm/meson.build
index 389f83b..c38b644 100644
--- a/tests/oem/ibm/meson.build
+++ b/tests/oem/ibm/meson.build
@@ -1,4 +1 @@
-tests += [
-  'oem/ibm/fileio',
-  'oem/ibm/host',
-]
+tests += ['oem/ibm/fileio', 'oem/ibm/host']
diff --git a/tests/oem/meta/meson.build b/tests/oem/meta/meson.build
index 03c33f5..fc9d183 100644
--- a/tests/oem/meta/meson.build
+++ b/tests/oem/meta/meson.build
@@ -1,3 +1 @@
-tests += [
-  'oem/meta/fileio',
-]
+tests += ['oem/meta/fileio']