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/nfsacl.h b/libc/kernel/uapi/linux/nfsacl.h
index a38d32b..3964cf2 100644
--- a/libc/kernel/uapi/linux/nfsacl.h
+++ b/libc/kernel/uapi/linux/nfsacl.h
@@ -32,5 +32,7 @@
 #define NFS_DFACL 0x0004
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define NFS_DFACLCNT 0x0008
+#define NFS_ACL_MASK 0x000f
 #define NFS_ACL_DEFAULT 0x1000
 #endif
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */