runtime: revise openbsd/arm runtime defs

The OpenBSD arm port switched to EABI in September 2016 - this revises the layout
of the runtime definitions to match what the kernel currently uses.

Change-Id: I1bca7de56979f576862a7c280631e835f7ae4278
Reviewed-on: https://go-review.googlesource.com/c/153577Reviewed-by: Ian Lance Taylor <iant@golang.org>

src/runtime/defs_openbsd_arm.go

@@ -132,6 +132,7 @@ type stackt struct {
 type timespec struct {
 	tv_sec    int64
 	tv_nsec   int32
+	pad_cgo_0 [4]byte
 }
 
 func (ts *timespec) set_sec(x int64) {
@@ -145,6 +146,7 @@ func (ts *timespec) set_nsec(x int32) {
 type timeval struct {
 	tv_sec    int64
 	tv_usec   int32
+	pad_cgo_0 [4]byte
 }
 
 func (tv *timeval) set_usec(x int32) {
@@ -161,6 +163,8 @@ type keventt struct {
 	filter    int16
 	flags     uint16
 	fflags    uint32
+	pad_cgo_0 [4]byte
 	data      int64
 	udata     *byte
+	pad_cgo_1 [4]byte
 }