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/unistd.h b/libc/kernel/uapi/asm-mips/asm/unistd.h
index 04a45bf..d5c3de3 100644
--- a/libc/kernel/uapi/asm-mips/asm/unistd.h
+++ b/libc/kernel/uapi/asm-mips/asm/unistd.h
@@ -466,10 +466,15 @@
 #define __NR_memfd_create (__NR_Linux + 354)
 #define __NR_bpf (__NR_Linux + 355)
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define __NR_Linux_syscalls 355
+#define __NR_execveat (__NR_Linux + 356)
+#define __NR_userfaultfd (__NR_Linux + 357)
+#define __NR_membarrier (__NR_Linux + 358)
+#define __NR_mlock2 (__NR_Linux + 359)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define __NR_Linux_syscalls 359
 #endif
 #define __NR_O32_Linux 4000
-#define __NR_O32_Linux_syscalls 355
+#define __NR_O32_Linux_syscalls 359
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #if _MIPS_SIM == _MIPS_SIM_ABI64
 #define __NR_Linux 5000
@@ -867,11 +872,16 @@
 #define __NR_memfd_create (__NR_Linux + 314)
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define __NR_bpf (__NR_Linux + 315)
-#define __NR_Linux_syscalls 315
+#define __NR_execveat (__NR_Linux + 316)
+#define __NR_userfaultfd (__NR_Linux + 317)
+#define __NR_membarrier (__NR_Linux + 318)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define __NR_mlock2 (__NR_Linux + 319)
+#define __NR_Linux_syscalls 319
 #endif
 #define __NR_64_Linux 5000
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define __NR_64_Linux_syscalls 315
+#define __NR_64_Linux_syscalls 319
 #if _MIPS_SIM == _MIPS_SIM_NABI32
 #define __NR_Linux 6000
 #define __NR_read (__NR_Linux + 0)
@@ -1273,9 +1283,14 @@
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define __NR_memfd_create (__NR_Linux + 318)
 #define __NR_bpf (__NR_Linux + 319)
-#define __NR_Linux_syscalls 319
+#define __NR_execveat (__NR_Linux + 320)
+#define __NR_userfaultfd (__NR_Linux + 321)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define __NR_membarrier (__NR_Linux + 322)
+#define __NR_mlock2 (__NR_Linux + 323)
+#define __NR_Linux_syscalls 323
 #endif
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define __NR_N32_Linux 6000
-#define __NR_N32_Linux_syscalls 319
+#define __NR_N32_Linux_syscalls 323
 #endif