Littlefs rebased to Master (#1205)

* Littlefs

src/FSCommon.cpp

@@ -3,20 +3,20 @@
 
 void fsInit()
 {
-#ifdef FS
-    if (!FSBegin()) 
+#ifdef FSCom
+    if (!FSBegin())
     {
         DEBUG_MSG("ERROR filesystem mount Failed\n");
         assert(0); // FIXME - report failure to phone
     }
 
     DEBUG_MSG("Filesystem files:\n");
-    File dir = FS.open("/");
+    File dir = FSCom.open("/");
     File f = dir.openNextFile();
     while (f) {
         DEBUG_MSG("  %s\n", f.name());
         f.close();
-        f = dir.openNextFile(); 
+        f = dir.openNextFile();
     }
 #endif
 }