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/bcm.h b/libc/kernel/uapi/linux/can/bcm.h
index 25d71e8..0a86166 100644
--- a/libc/kernel/uapi/linux/can/bcm.h
+++ b/libc/kernel/uapi/linux/can/bcm.h
@@ -21,12 +21,17 @@
 #include <linux/types.h>
 #include <linux/can.h>
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+struct bcm_timeval {
+  long tv_sec;
+  long tv_usec;
+};
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct bcm_msg_head {
   __u32 opcode;
   __u32 flags;
   __u32 count;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-  struct timeval ival1, ival2;
+  struct bcm_timeval ival1, ival2;
   canid_t can_id;
   __u32 nframes;
   struct can_frame frames[0];