Fix more CI errors

* Rollback FreeBSD definitions to circa 10.3-RELEASE
* Remove EVFILT_SYSCOUNT across the board.  It's value is changeable, so
  it's not safe to define with FFI.

src/unix/bsd/apple/mod.rs

@@ -1012,7 +1012,6 @@ pub const EVFILT_MACHPORT: ::int16_t = -8;
 pub const EVFILT_FS: ::int16_t = -9;
 pub const EVFILT_USER: ::int16_t = -10;
 pub const EVFILT_VM: ::int16_t = -12;
-pub const EVFILT_SYSCOUNT: ::int16_t = 13;
 
 pub const EV_ADD: ::uint16_t = 0x1;
 pub const EV_DELETE: ::uint16_t = 0x2;

src/unix/bsd/freebsdlike/dragonfly/mod.rs

@@ -253,7 +253,6 @@ pub const EVFILT_TIMER: ::int16_t = -7;
 pub const EVFILT_PROCDESC: ::int16_t = -8;
 pub const EVFILT_USER: ::int16_t = -9;
 pub const EVFILT_FS: ::int16_t = -10;
-pub const EVFILT_SYSCOUNT: ::int16_t = 10;
 
 pub const EV_ADD: ::uint16_t = 0x1;
 pub const EV_DELETE: ::uint16_t = 0x2;

src/unix/bsd/freebsdlike/freebsd/mod.rs

@@ -64,12 +64,9 @@ pub const EVFILT_VNODE: ::int16_t = -4;
 pub const EVFILT_PROC: ::int16_t = -5;
 pub const EVFILT_SIGNAL: ::int16_t = -6;
 pub const EVFILT_TIMER: ::int16_t = -7;
-pub const EVFILT_PROCDESC: ::int16_t = -8;
 pub const EVFILT_FS: ::int16_t = -9;
 pub const EVFILT_LIO: ::int16_t = -10;
 pub const EVFILT_USER: ::int16_t = -11;
-pub const EVFILT_SENDFILE: ::int16_t = -12;
-pub const EVFILT_SYSCOUNT: ::int16_t = 12;
 
 pub const EV_ADD: ::uint16_t = 0x1;
 pub const EV_DELETE: ::uint16_t = 0x2;
@@ -79,10 +76,8 @@ pub const EV_ONESHOT: ::uint16_t = 0x10;
 pub const EV_CLEAR: ::uint16_t = 0x20;
 pub const EV_RECEIPT: ::uint16_t = 0x40;
 pub const EV_DISPATCH: ::uint16_t = 0x80;
-pub const EV_FORCEONESHOT: ::uint16_t = 0x100;
 pub const EV_DROP: ::uint16_t = 0x1000;
 pub const EV_FLAG1: ::uint16_t = 0x2000;
-pub const EV_FLAG2: ::uint16_t = 0x4000;
 pub const EV_ERROR: ::uint16_t = 0x4000;
 pub const EV_EOF: ::uint16_t = 0x8000;
 pub const EV_SYSFLAGS: ::uint16_t = 0xf000;
@@ -95,18 +90,13 @@ pub const NOTE_FFCOPY: ::uint32_t = 0xc0000000;
 pub const NOTE_FFCTRLMASK: ::uint32_t = 0xc0000000;
 pub const NOTE_FFLAGSMASK: ::uint32_t = 0x00ffffff;
 pub const NOTE_LOWAT: ::uint32_t = 0x00000001;
-pub const NOTE_FILE_POLL: ::uint32_t = 0x00000002;
 pub const NOTE_DELETE: ::uint32_t = 0x00000001;
 pub const NOTE_WRITE: ::uint32_t = 0x00000002;
 pub const NOTE_EXTEND: ::uint32_t = 0x00000004;
 pub const NOTE_ATTRIB: ::uint32_t = 0x00000008;
 pub const NOTE_LINK: ::uint32_t = 0x00000010;
 pub const NOTE_RENAME: ::uint32_t = 0x00000020;
 pub const NOTE_REVOKE: ::uint32_t = 0x00000040;
-pub const NOTE_OPEN: ::uint32_t = 0x00000080;
-pub const NOTE_CLOSE: ::uint32_t = 0x00000100;
-pub const NOTE_CLOSE_WRITE: ::uint32_t = 0x00000200;
-pub const NOTE_READ: ::uint32_t = 0x00000400;
 pub const NOTE_EXIT: ::uint32_t = 0x80000000;
 pub const NOTE_FORK: ::uint32_t = 0x40000000;
 pub const NOTE_EXEC: ::uint32_t = 0x20000000;

src/unix/bsd/openbsdlike/bitrig.rs

@@ -291,7 +291,6 @@ pub const EVFILT_AIO: ::int16_t = -3;
 pub const EVFILT_PROC: ::int16_t = -5;
 pub const EVFILT_READ: ::int16_t = -1;
 pub const EVFILT_SIGNAL: ::int16_t = -6;
-pub const EVFILT_SYSCOUNT: ::int16_t = 7;
 pub const EVFILT_TIMER: ::int16_t = -7;
 pub const EVFILT_VNODE: ::int16_t = -4;
 pub const EVFILT_WRITE: ::int16_t = -2;

src/unix/bsd/openbsdlike/netbsd.rs

@@ -359,7 +359,6 @@ pub const EVFILT_AIO: ::int32_t = 2;
 pub const EVFILT_PROC: ::int32_t = 4;
 pub const EVFILT_READ: ::int32_t = 0;
 pub const EVFILT_SIGNAL: ::int32_t = 5;
-pub const EVFILT_SYSCOUNT: ::int32_t = 7;
 pub const EVFILT_TIMER: ::int32_t = 6;
 pub const EVFILT_VNODE: ::int32_t = 3;
 pub const EVFILT_WRITE: ::int32_t = 1;

src/unix/bsd/openbsdlike/openbsd.rs

@@ -277,7 +277,6 @@ pub const EVFILT_AIO: ::int16_t = -3;
 pub const EVFILT_PROC: ::int16_t = -5;
 pub const EVFILT_READ: ::int16_t = -1;
 pub const EVFILT_SIGNAL: ::int16_t = -6;
-pub const EVFILT_SYSCOUNT: ::int16_t = 7;
 pub const EVFILT_TIMER: ::int16_t = -7;
 pub const EVFILT_VNODE: ::int16_t = -4;
 pub const EVFILT_WRITE: ::int16_t = -2;