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/if_arcnet.h b/libc/kernel/uapi/linux/if_arcnet.h
index d010c7e..20bf783 100644
--- a/libc/kernel/uapi/linux/if_arcnet.h
+++ b/libc/kernel/uapi/linux/if_arcnet.h
@@ -74,21 +74,23 @@
   } mes;
 };
 struct arc_hardware {
-  __u8 source, dest, offset[2];
+  __u8 source;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  __u8 dest;
+  __u8 offset[2];
 };
 #define ARC_HDR_SIZE 4
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct archdr {
   struct arc_hardware hard;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
   union {
     struct arc_rfc1201 rfc1201;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
     struct arc_rfc1051 rfc1051;
     struct arc_eth_encap eth_encap;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
     struct arc_cap cap;
     __u8 raw[0];
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
   } soft;
 };
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif