cleanup: Reformat with clang

Also update required meson version to support
`get_variable` and remove deprecated get_pkgconfig_variable.

Change-Id: I1a0d5a9fce077d546cf56078b63c49ee52f1a816
Signed-off-by: Willy Tu <wltu@google.com>
diff --git a/machine_name.cpp b/machine_name.cpp
index d17a592..4946cd6 100644
--- a/machine_name.cpp
+++ b/machine_name.cpp
@@ -57,7 +57,7 @@
     reply.reserve(len);
     reply.emplace_back(machineName->size()); /* machineNameLength */
     reply.insert(reply.end(), machineName->begin(),
-                 machineName->end()); /* machineName */
+                 machineName->end());        /* machineName */
 
     return ::ipmi::responseSuccess(SysOEMCommands::SysMachineName, reply);
 }