Updated to v4.4.1 kernel headers.

Small modifications needed to allow compilation with the new headers:

- Manually modify bionic/libc/kernel/uapi/asm-mips/asm/siginfo.h to
  remove the uapi from the include.
- PR_XXX defines are now available for mips, so remove the definition
  from linker_mips.cpp.

Bug: 23789423
Change-Id: I6dc8a03b012426d3a937db15cb24d3a50fab5a8c
diff --git a/libc/kernel/uapi/linux/ip.h b/libc/kernel/uapi/linux/ip.h
index 8567d24..a56f1d6 100644
--- a/libc/kernel/uapi/linux/ip.h
+++ b/libc/kernel/uapi/linux/ip.h
@@ -173,8 +173,9 @@
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
   IPV4_DEVCONF_IGMPV2_UNSOLICITED_REPORT_INTERVAL,
   IPV4_DEVCONF_IGMPV3_UNSOLICITED_REPORT_INTERVAL,
+  IPV4_DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN,
   __IPV4_DEVCONF_MAX
-};
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+};
 #define IPV4_DEVCONF_MAX (__IPV4_DEVCONF_MAX - 1)
 #endif