Move fcntl.h from mysql2_ext.h to infile.c

Author: sodabrew

ext/mysql2/infile.c

@@ -2,6 +2,7 @@
 
 #include <errno.h>
 #include <unistd.h>
+#include <fcntl.h>
 
 #define ERROR_LEN 1024
 typedef struct

ext/mysql2/mysql2_ext.h

@@ -6,7 +6,6 @@
    we'll never modify the pointers we get back from RSTRING_PTR */
 #define RSTRING_NOT_MODIFIED
 #include <ruby.h>
-#include <fcntl.h>
 
 #ifndef HAVE_UINT
 #define HAVE_UINT