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/asm-mips/asm/socket.h b/libc/kernel/uapi/asm-mips/asm/socket.h
index 38e4e63..4405053 100644
--- a/libc/kernel/uapi/asm-mips/asm/socket.h
+++ b/libc/kernel/uapi/asm-mips/asm/socket.h
@@ -88,4 +88,8 @@
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define SO_MAX_PACING_RATE 47
 #define SO_BPF_EXTENSIONS 48
+#define SO_INCOMING_CPU 49
+#define SO_ATTACH_BPF 50
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define SO_DETACH_BPF SO_DETACH_FILTER
 #endif