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_i2c.cpp b/pcie_i2c.cpp
index 2c7af4d..8a8b839 100644
--- a/pcie_i2c.cpp
+++ b/pcie_i2c.cpp
@@ -102,7 +102,7 @@
     reply.emplace_back(i2c_bus_number);          /* i2c_bus_number */
     reply.emplace_back(pcie_slot_name.length()); /* pcie_slot_name length */
     reply.insert(reply.end(), pcie_slot_name.begin(),
-                 pcie_slot_name.end()); /* pcie_slot_name */
+                 pcie_slot_name.end());          /* pcie_slot_name */
 
     return ::ipmi::responseSuccess(SysOEMCommands::SysPcieSlotI2cBusMapping,
                                    reply);