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/can/raw.h b/libc/kernel/uapi/linux/can/raw.h
index a70d881..0a19352 100644
--- a/libc/kernel/uapi/linux/can/raw.h
+++ b/libc/kernel/uapi/linux/can/raw.h
@@ -28,6 +28,7 @@
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
   CAN_RAW_RECV_OWN_MSGS,
   CAN_RAW_FD_FRAMES,
+  CAN_RAW_JOIN_FILTERS,
 };
-#endif
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#endif