Add cortex-a7 specific routines.

Test: Changed angler target to use cortex-a7 and I compiled.
Test: Booted this version on angler and ran bionic-unit-tests.

Change-Id: Ice7f6ea38a2569582161a8e659d7877918c1a45a
diff --git a/libc/Android.bp b/libc/Android.bp
index f326db3..04c62b3 100644
--- a/libc/Android.bp
+++ b/libc/Android.bp
@@ -796,14 +796,14 @@
             cortex_a7: {
                 srcs: [
                     "arch-arm/cortex-a7/bionic/memset.S",
+                    "arch-arm/cortex-a7/bionic/memcpy.S",
+                    "arch-arm/cortex-a7/bionic/__strcat_chk.S",
+                    "arch-arm/cortex-a7/bionic/__strcpy_chk.S",
 
-                    "arch-arm/cortex-a15/bionic/memcpy.S",
                     "arch-arm/cortex-a15/bionic/stpcpy.S",
                     "arch-arm/cortex-a15/bionic/strcat.S",
-                    "arch-arm/cortex-a15/bionic/__strcat_chk.S",
                     "arch-arm/cortex-a15/bionic/strcmp.S",
                     "arch-arm/cortex-a15/bionic/strcpy.S",
-                    "arch-arm/cortex-a15/bionic/__strcpy_chk.S",
                     "arch-arm/cortex-a15/bionic/strlen.S",
 
                     "arch-arm/denver/bionic/memmove.S",