cortex-a9: Fix reference to __memcpy_base_aligned.

With a different memcpy, __memcpy_base_aligned ceased to exist.
Instead, point to the name defined by whatever includes memcpy_base.S

Change-Id: I242cf49cbada35337ba155d7f170e86a905ff55f
diff --git a/libc/arch-arm/cortex-a9/bionic/memcpy_base.S b/libc/arch-arm/cortex-a9/bionic/memcpy_base.S
index 5e81305..bb08b94 100644
--- a/libc/arch-arm/cortex-a9/bionic/memcpy_base.S
+++ b/libc/arch-arm/cortex-a9/bionic/memcpy_base.S
@@ -44,7 +44,7 @@
         /* check if buffers are aligned. If so, run arm-only version */
         eor         r3, r0, r1
         ands        r3, r3, #0x3
-        beq         __memcpy_base_aligned
+        beq         MEMCPY_BASE_ALIGNED
 
         /* Check the upper size limit for Neon unaligned memory access in memcpy */
         cmp         r2, #224