denver: optimize memmove

Optimize 32-bit denver memmove with reversal memcpy.

Change-Id: Iaad0a9475248cdd7e4f50d58bea9db1b767abc88
diff --git a/libc/arch-arm/denver/denver.mk b/libc/arch-arm/denver/denver.mk
index 3fcc457..6989187 100644
--- a/libc/arch-arm/denver/denver.mk
+++ b/libc/arch-arm/denver/denver.mk
@@ -1,12 +1,13 @@
 libc_bionic_src_files_arm += \
     arch-arm/denver/bionic/memcpy.S \
+    arch-arm/denver/bionic/memmove.S \
     arch-arm/denver/bionic/memset.S \
     arch-arm/denver/bionic/__strcat_chk.S \
-    arch-arm/denver/bionic/__strcpy_chk.S
+    arch-arm/denver/bionic/__strcpy_chk.S \
 
 # Use cortex-a15 versions of strcat/strcpy/strlen.
 libc_bionic_src_files_arm += \
     arch-arm/cortex-a15/bionic/strcat.S \
     arch-arm/cortex-a15/bionic/strcpy.S \
     arch-arm/cortex-a15/bionic/strlen.S \
-    arch-arm/cortex-a15/bionic/strcmp.S
+    arch-arm/cortex-a15/bionic/strcmp.S \