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/pcie_bifurcation.cpp b/pcie_bifurcation.cpp
index 71c25cd..faa6bd9 100644
--- a/pcie_bifurcation.cpp
+++ b/pcie_bifurcation.cpp
@@ -66,7 +66,7 @@
     reply.reserve(bifurcation.size() + sizeof(struct PcieBifurcationReply));
     reply.emplace_back(bifurcation.size()); /* bifurcationLength */
     reply.insert(reply.end(), bifurcation.begin(),
-                 bifurcation.end()); /* bifurcation */
+                 bifurcation.end());        /* bifurcation */
 
     return ::ipmi::responseSuccess(SysOEMCommands::SysPCIeSlotBifurcation,
                                    reply);