Add process_vm_readv and process_vm_writev.

Bug: http://b/21761353
Change-Id: Ic8ef3f241d62d2a4271fbc783c8af50257bac498
diff --git a/libc/arch-arm/syscalls/process_vm_writev.S b/libc/arch-arm/syscalls/process_vm_writev.S
new file mode 100644
index 0000000..4c21c43
--- /dev/null
+++ b/libc/arch-arm/syscalls/process_vm_writev.S
@@ -0,0 +1,22 @@
+/* Generated by gensyscalls.py. Do not edit. */
+
+#include <private/bionic_asm.h>
+
+ENTRY(process_vm_writev)
+    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_process_vm_writev
+    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(process_vm_writev)