libgo: Update to weekly.2012-02-07.

R=iant
CC=gofrontend-dev
https://golang.org/cl/5644065
diff --git a/libgo/go/syscall/syscall.go b/libgo/go/syscall/syscall.go
index f777197..4efaaec 100644
--- a/libgo/go/syscall/syscall.go
+++ b/libgo/go/syscall/syscall.go
@@ -33,6 +33,7 @@
 var _zero uintptr
 
 var dummy *byte
+
 const sizeofPtr uintptr = uintptr(unsafe.Sizeof(dummy))
 
 func (ts *Timespec) Unix() (sec int64, nsec int64) {
@@ -42,3 +43,11 @@
 func (tv *Timeval) Unix() (sec int64, nsec int64) {
 	return int64(tv.Sec), int64(tv.Usec) * 1000
 }
+
+func (ts *Timespec) Nano() int64 {
+	return int64(ts.Sec)*1e9 + int64(ts.Nsec)
+}
+
+func (tv *Timeval) Nano() int64 {
+	return int64(tv.Sec)*1e9 + int64(tv.Usec)*1000
+}