Make memcpy memmove

Bug: http://b/63992911
Test: Change BoardConfig.mk and compile for each variant
Change-Id: Ia0cc68d8e90e3316ddb2e9ff1555a009b6a0c5be
diff --git a/libc/arch-arm/krait/bionic/memcpy.S b/libc/arch-arm/krait/bionic/memcpy.S
index f22c063..49fd040 100644
--- a/libc/arch-arm/krait/bionic/memcpy.S
+++ b/libc/arch-arm/krait/bionic/memcpy.S
@@ -42,7 +42,7 @@
         .thumb
         .thumb_func
 
-ENTRY(memcpy)
+ENTRY(__memcpy)
         pld     [r1, #64]
         stmfd   sp!, {r0, lr}
         .cfi_adjust_cfa_offset 8
@@ -50,4 +50,4 @@
         .cfi_rel_offset lr, 4
 
 #include "memcpy_base.S"
-END(memcpy)
+END(__memcpy)