code review 5490053: runtime: make more build-friendly

src/pkg/runtime/signal_darwin_amd64.c

 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 #include "runtime.h"
-#include "defs.h"
-#include "os.h"
-#include "signals.h"
+#include "defs_GOOS_GOARCH.h"
+#include "os_GOOS.h"
+#include "signals_GOOS.h"
 
 void
 runtime·dumpregs(Regs64 *r)
 {
         runtime·printf("rax     %X\n", r->rax);
         runtime·printf("rbx     %X\n", r->rbx);
         runtime·printf("rcx     %X\n", r->rcx);
         runtime·printf("rdx     %X\n", r->rdx);
         runtime·printf("rdi     %X\n", r->rdi);
         runtime·printf("rsi     %X\n", r->rsi);
@@ skipping 176 matching lines @@
         }
         m->profilehz = hz;
 }
 
 void
 os·sigpipe(void)
 {
         sigaction(SIGPIPE, SIG_DFL, false);
         runtime·raisesigpipe();
 }