split parameters for logging and tuning

add a flag to enable/disable tuning: default off
add an option for specifying a folder for outputting logs.

Closes: #10
Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: I43864768f1dee8672f13288d3cf5a0c87c373aed
diff --git a/pid/pidloop.cpp b/pid/pidloop.cpp
index b684747..f613c7e 100644
--- a/pid/pidloop.cpp
+++ b/pid/pidloop.cpp
@@ -45,7 +45,7 @@
 {
     if (first)
     {
-        if (tuningLoggingEnabled)
+        if (loggingEnabled)
         {
             zone->initializeLog();
         }
@@ -104,7 +104,7 @@
             // Run the fan PIDs every iteration.
             zone->processFans();
 
-            if (tuningLoggingEnabled)
+            if (loggingEnabled)
             {
                 zone->getLogHandle() << "," << zone->getFailSafeMode();
                 zone->getLogHandle() << std::endl;