Include what you use: <fcntl.h>

This was transitively included, but no longer is, so it must be
explicitly included.

Exempt-From-Owner-Approval: Janitorial
Test: build
Change-Id: I89657fa33df4bc0f92685012b3ab9b24d55d1619

libpsi/psi.cpp

@@ -17,6 +17,7 @@
 #define LOG_TAG "libpsi"
 
 #include <errno.h>
+#include <fcntl.h>
 #include <string.h>
 #include <sys/epoll.h>
 

statslog.cpp

@@ -16,6 +16,7 @@
 
 #include <assert.h>
 #include <errno.h>
+#include <fcntl.h>
 #include <log/log.h>
 #include <log/log_id.h>
 #include <statslog.h>