meson: reformat with meson formatter

Apply the `meson format` results.

Change-Id: I3395494124ea1c7305056d7a58a02a4db68c0144
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/transport/meson.build b/transport/meson.build
index 4011220..9e5a241 100644
--- a/transport/meson.build
+++ b/transport/meson.build
@@ -1,3 +1,3 @@
 if get_option('transport-implementation') == 'serial'
-  subdir('serialbridge')
+    subdir('serialbridge')
 endif