runtime: generate defs_darwin_*.go again

As part of the conversion to Go, the defs_*.go files were converted
directly instead of being regenerated with cgo -godefs. The result
is they have diverged from the generated code, making the original
scripts hard to use. This CL includes the generated defs_darwin_*.go
files with no manual changes made to them.

Includes minimal changes to other OS defs so that code shared with
darwin can use the names directly generated by cgo.

Manually tested darwin/{arm,arm64,386,amd64}.

Change-Id: I48ee85842d67838e212224cf9882b54361392d75

Author: crawshaw

src/runtime/defs1_netbsd_386.go

@@ -120,17 +120,17 @@ func (ts *timespec) set_nsec(x int32) {
 }
 
 type timeval struct {
-	tv_sec  int64
-	tv_usec int32
+	Sec  int64
+	Usec int32
 }
 
-func (tv *timeval) set_usec(x int32) {
-	tv.tv_usec = x
+func (tv *timeval) setUsec(x int32) {
+	tv.Usec = x
 }
 
 type itimerval struct {
-	it_interval timeval
-	it_value    timeval
+	Interval timeval
+	Value    timeval
 }
 
 type mcontextt struct {
@@ -149,12 +149,12 @@ type ucontextt struct {
 }
 
 type keventt struct {
-	ident  uint32
-	filter uint32
-	flags  uint32
-	fflags uint32
-	data   int64
-	udata  *byte
+	Ident  uint32
+	Filter uint32
+	Flags  uint32
+	Fflags uint32
+	Data   int64
+	Udata  *byte
 }
 
 // created by cgo -cdefs and then converted to Go

src/runtime/defs1_netbsd_amd64.go

@@ -123,18 +123,18 @@ func (ts *timespec) set_nsec(x int32) {
 }
 
 type timeval struct {
-	tv_sec    int64
-	tv_usec   int32
+	Sec       int64
+	Usec      int32
 	pad_cgo_0 [4]byte
 }
 
-func (tv *timeval) set_usec(x int32) {
-	tv.tv_usec = x
+func (tv *timeval) setUsec(x int32) {
+	tv.Usec = x
 }
 
 type itimerval struct {
-	it_interval timeval
-	it_value    timeval
+	Interval timeval
+	Value    timeval
 }
 
 type mcontextt struct {
@@ -153,13 +153,13 @@ type ucontextt struct {
 }
 
 type keventt struct {
-	ident     uint64
-	filter    uint32
-	flags     uint32
-	fflags    uint32
+	Ident     uint64
+	Filter    uint32
+	Flags     uint32
+	Fflags    uint32
 	pad_cgo_0 [4]byte
-	data      int64
-	udata     *byte
+	Data      int64
+	Udata     *byte
 }
 
 // created by cgo -cdefs and then converted to Go

src/runtime/defs1_netbsd_arm.go

@@ -121,17 +121,17 @@ func (ts *timespec) set_nsec(x int32) {
 }
 
 type timeval struct {
-	tv_sec  int64
-	tv_usec int32
+	Sec  int64
+	Usec int32
 }
 
-func (tv *timeval) set_usec(x int32) {
-	tv.tv_usec = x
+func (tv *timeval) setUsec(x int32) {
+	tv.Usec = x
 }
 
 type itimerval struct {
-	it_interval timeval
-	it_value    timeval
+	Interval timeval
+	Value    timeval
 }
 
 type mcontextt struct {
@@ -151,12 +151,12 @@ type ucontextt struct {
 }
 
 type keventt struct {
-	ident  uint32
-	filter uint32
-	flags  uint32
-	fflags uint32
-	data   int64
-	udata  *byte
+	Ident  uint32
+	Filter uint32
+	Flags  uint32
+	Fflags uint32
+	Data   int64
+	Udata  *byte
 }
 
 // created by cgo -cdefs and then converted to Go

src/runtime/defs1_solaris_amd64.go

@@ -168,17 +168,17 @@ type timespec struct {
 }
 
 type timeval struct {
-	tv_sec  int64
-	tv_usec int64
+	Sec  int64
+	Usec int64
 }
 
-func (tv *timeval) set_usec(x int32) {
-	tv.tv_usec = int64(x)
+func (tv *timeval) setUsec(x int32) {
+	tv.Usec = int64(x)
 }
 
 type itimerval struct {
-	it_interval timeval
-	it_value    timeval
+	Interval timeval
+	Value    timeval
 }
 
 type portevent struct {