style: rename main globals per style

Rename the main global variables per openbmc style.

Change-Id: I9de8cf841304f24238ae0275b6904f4926a6892d
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/scripts/writepid.mako.cpp b/scripts/writepid.mako.cpp
index f168e10..1718bd1 100644
--- a/scripts/writepid.mako.cpp
+++ b/scripts/writepid.mako.cpp
@@ -6,7 +6,7 @@
 #include <map>
 #include "conf.hpp"
 
-std::map<int64_t, PIDConf> ZoneConfig = {
+std::map<int64_t, PIDConf> zoneConfig = {
 % for zone in PIDDict.iterkeys():
     % if zone:
     {${zone},