Support more syscalls in linux-record: pipe2 epoll_create1 eventfd2 fallocate dup3...

Support more syscalls in linux-record: pipe2 epoll_create1 eventfd2 fallocate dup3 and inotify_init1

This patch adds more syscalls in linux-record.

gdb:

2016-02-29  Yao Qi  <yao.qi@linaro.org>

	* linux-record.h (enum gdb_syscall) <gdb_sys_fallocate>: New.
	<gdb_sys_eventfd2, gdb_sys_epoll_create1, gdb_sys_dup3>: New.
	<gdb_sys_pipe2, gdb_sys_inotify_init1>: New.
	* linux-record.c (record_linux_system_call): Handle them.