runtime: fix struct Sigaction for Linux/386

        We need to use kernel headers to generate defs_linux_$GOARCH.h

R=golang-dev, dave, alex.brainman, iant
CC=golang-dev
https://golang.org/cl/6296091

diff --git a/src/pkg/runtime/defs_linux_386.h b/src/pkg/runtime/defs_linux_386.h
index 02760f987bce2cd97581e0b0b61554a73895c0fe..e257a6f85fdb60642dfaf97c3d3d7d6a06db73fb 100644 (file)
--- a/src/pkg/runtime/defs_linux_386.h
+++ b/src/pkg/runtime/defs_linux_386.h
@@ -132,7 +132,7 @@ struct Sigaction {
        void    *k_sa_handler;
        uint32  sa_flags;
        void    *sa_restorer;
-       uint32  sa_mask;
+       uint64  sa_mask;
 };
 struct Siginfo {
        int32   si_signo;