Linux Sandbox: get everything to compile on Android.

sandbox/linux/services/android_arm_ucontext.h

Index: sandbox/linux/services/android_arm_ucontext.h
diff --git a/sandbox/linux/services/android_arm_ucontext.h b/sandbox/linux/services/android_arm_ucontext.h
new file mode 100644
index 0000000000000000000000000000000000000000..c35da17b26b69f2e742d2cb4d754f55f77c0a398
--- /dev/null
+++ b/sandbox/linux/services/android_arm_ucontext.h
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef SANDBOX_LINUX_SERVICES_ANDROID_ARM_UCONTEXT_H_
+#define SANDBOX_LINUX_SERVICES_ANDROID_ARM_UCONTEXT_H_
+typedef long int greg_t;
+typedef unsigned long sigset_t;
+typedef struct ucontext {
+  unsigned long   uc_flags;
+  struct ucontext  *uc_link;
+  stack_t     uc_stack;
+  struct sigcontext uc_mcontext;
+  sigset_t    uc_sigmask;
+  /* Allow for uc_sigmask growth.  Glibc uses a 1024-bit sigset_t.  */
+  int     __not_used[32 - (sizeof (sigset_t) / sizeof (int))];
+  /* Last for extensibility.  Eight byte aligned because some
+     coprocessors require eight byte alignment.  */
+  unsigned long   uc_regspace[128] __attribute__((__aligned__(8)));
+} ucontext_t;
+#endif  // SANDBOX_LINUX_SERVICES_ANDROID_ARM_UCONTEXT_H_