Arm32 dynamic function dispatch

Test: Run bionic unit test.
Test: Use gdb to make sure the right function is selected.

Change-Id: I34ccd83d472c13993f75672b1aac2b2eae65c499
diff --git a/libc/arch-arm/kryo/bionic/memcpy.S b/libc/arch-arm/kryo/bionic/memcpy.S
index 74036ef..1fcc8d0 100644
--- a/libc/arch-arm/kryo/bionic/memcpy.S
+++ b/libc/arch-arm/kryo/bionic/memcpy.S
@@ -34,7 +34,7 @@
 #define PLDSIZE (128) /* L2 cache line size */
 
         .code 32
-ENTRY(__memcpy)
+ENTRY(__memcpy_kryo)
         push            {r0}
         .cfi_def_cfa_offset 4
         .cfi_rel_offset r0, 0
@@ -123,4 +123,4 @@
         pop             {r0}
         bx              lr
 
-END(__memcpy)
+END(__memcpy_kryo)