Update dependencies

vendor/modernc.org/libc/etc.go

@@ -395,14 +395,17 @@ func cString(t *TLS, s string) uintptr { //TODO-
 	return p
 }
 
-// VaList fills a varargs list at p with args and returns uintptr(p).  The list
-// must have been allocated by caller and it must not be in Go managed
-// memory, ie. it must be pinned. Caller is responsible for freeing the list.
+// VaList fills a varargs list at p with args and returns p.  The list must
+// have been allocated by caller and it must not be in Go managed memory, ie.
+// it must be pinned. Caller is responsible for freeing the list.
 //
 // Individual arguments must be one of int, uint, int32, uint32, int64, uint64,
 // float64, uintptr or Intptr. Other types will panic.
 //
-// Note: The C translated to Go varargs ABI alignment for all types is 8 at all
+// This function supports code generated by ccgo/v3. For manually constructed
+// var args it's recommended to use the NewVaList function instead.
+//
+// Note: The C translated to Go varargs ABI alignment for all types is 8 on all
 // architectures.
 func VaList(p uintptr, args ...interface{}) (r uintptr) {
 	if p&7 != 0 {
@@ -438,6 +441,22 @@ func VaList(p uintptr, args ...interface{}) (r uintptr) {
 	return r
 }
 
+// NewVaListN returns a newly allocated va_list for n items. The caller of
+// NewVaListN is responsible for freeing the va_list.
+func NewVaListN(n int) (va_list uintptr) {
+	return Xmalloc(nil, types.Size_t(8*n))
+}
+
+// NewVaList is like VaList but automatically allocates the correct amount of
+// memory for all of the items in args.
+//
+// The va_list return value is used to pass the constructed var args to var
+// args accepting functions. The caller of NewVaList is responsible for freeing
+// the va_list.
+func NewVaList(args ...interface{}) (va_list uintptr) {
+	return VaList(NewVaListN(len(args)), args...)
+}
+
 func VaInt32(app *uintptr) int32 {
 	ap := *(*uintptr)(unsafe.Pointer(app))
 	if ap == 0 {