Add posix_fadvise(3).

(cherry-pick of 00008263782e484020420c606f7d145fe7d0a4d8.)

Bug: 12449798
Change-Id: I07cbf3f670a0d1304b68148325a774f266b5c433
diff --git a/libc/arch-arm/syscalls/__arm_fadvise64_64.S b/libc/arch-arm/syscalls/__arm_fadvise64_64.S
new file mode 100644
index 0000000..761c4d6
--- /dev/null
+++ b/libc/arch-arm/syscalls/__arm_fadvise64_64.S
@@ -0,0 +1,22 @@
+/* Generated by gensyscalls.py. Do not edit. */
+
+#include <private/bionic_asm.h>
+
+ENTRY(__arm_fadvise64_64)
+    mov     ip, sp
+    stmfd   sp!, {r4, r5, r6, r7}
+    .cfi_def_cfa_offset 16
+    .cfi_rel_offset r4, 0
+    .cfi_rel_offset r5, 4
+    .cfi_rel_offset r6, 8
+    .cfi_rel_offset r7, 12
+    ldmfd   ip, {r4, r5, r6}
+    ldr     r7, =__NR_arm_fadvise64_64
+    swi     #0
+    ldmfd   sp!, {r4, r5, r6, r7}
+    .cfi_def_cfa_offset 0
+    cmn     r0, #(MAX_ERRNO + 1)
+    bxls    lr
+    neg     r0, r0
+    b       __set_errno_internal
+END(__arm_fadvise64_64)