Rename 'statistics.c' to 'counter.c'
With stat_item, stats.c and stats_statsd.c, it is becoming a bit
difficult to understand file naming. Also, the 'statistics.c' file
actually only contained osmo_counter handling, so let's rename it to
counter.c altogether.
Change-Id: I2cfb2310543902b7da46cb15a76e2da317eaed7d
diff --git a/src/stats.c b/src/stats.c
index b39ec53..d9df232 100644
--- a/src/stats.c
+++ b/src/stats.c
@@ -46,7 +46,7 @@
#include <osmocom/core/rate_ctr.h>
#include <osmocom/core/stat_item.h>
#include <osmocom/core/timer.h>
-#include <osmocom/core/statistics.h>
+#include <osmocom/core/counter.h>
#include <osmocom/core/msgb.h>
#define STATS_DEFAULT_INTERVAL 5 /* secs */