libev-4.25

[Mygod]

4.25 Fri Dec 21 07:49:20 CET 2018
        - INCOMPATIBLE CHANGE: EV_THROW was renamed to EV_NOEXCEPT
          (EV_THROW sitll provided) and now uses noexcept on C++11 or newer.
	- move the darwin select workaround highe rin ev.c, as newer versions of
          darwin managed to break their broken select even more.
	- ANDROID => __ANDROID__ (reported by enh@google.com).
        - disable epoll_create1 on android because it has broken header files
          and google is unwilling to fix them (reported by enh@google.com).
        - avoid a minor compilation warning on win32.
        - c++: remove deprecated dynamic throw() specifications.
        - c++: improve the (unsupported) bad_loop exception class.
        - backport perl ev_periodic example to C, untested.
        - update libecb, biggets change is to include a memory fence
          in ECB_MEMORY_FENCE_RELEASE on x86/amd64.
        - minor autoconf/automake modernisation.

[Mygod]

Actually shadowsocks-android will no longer be using this repo for now.