Add cortex_a53_64 and cortex_a53_a57

Renames cortex_a53 to cortex_a53_64, since we need to set options for
both. Also adds the cortex_a53_a57 big/little configuration.

Change-Id: Ia0e8104867f9aed7cbf5be8be1ead6ddc30c42c4
diff --git a/common/arch.go b/common/arch.go
index 644332b..28b5dd6 100644
--- a/common/arch.go
+++ b/common/arch.go
@@ -131,16 +131,18 @@
 		Armv7_a_neon interface{} `blueprint:"filter(android:\"arch_variant\")"`
 
 		// Arm cpu variants
-		Cortex_a7  interface{} `blueprint:"filter(android:\"arch_variant\")"`
-		Cortex_a8  interface{} `blueprint:"filter(android:\"arch_variant\")"`
-		Cortex_a9  interface{} `blueprint:"filter(android:\"arch_variant\")"`
-		Cortex_a15 interface{} `blueprint:"filter(android:\"arch_variant\")"`
-		Krait      interface{} `blueprint:"filter(android:\"arch_variant\")"`
-		Denver     interface{} `blueprint:"filter(android:\"arch_variant\")"`
+		Cortex_a7      interface{} `blueprint:"filter(android:\"arch_variant\")"`
+		Cortex_a8      interface{} `blueprint:"filter(android:\"arch_variant\")"`
+		Cortex_a9      interface{} `blueprint:"filter(android:\"arch_variant\")"`
+		Cortex_a15     interface{} `blueprint:"filter(android:\"arch_variant\")"`
+		Cortex_a53     interface{} `blueprint:"filter(android:\"arch_variant\")"`
+		Cortex_a53_a57 interface{} `blueprint:"filter(android:\"arch_variant\")"`
+		Krait          interface{} `blueprint:"filter(android:\"arch_variant\")"`
+		Denver         interface{} `blueprint:"filter(android:\"arch_variant\")"`
 
 		// Arm64 cpu variants
-		Cortex_a53 interface{} `blueprint:"filter(android:\"arch_variant\")"`
-		Denver64   interface{} `blueprint:"filter(android:\"arch_variant\")"`
+		Cortex_a53_64 interface{} `blueprint:"filter(android:\"arch_variant\")"`
+		Denver64      interface{} `blueprint:"filter(android:\"arch_variant\")"`
 
 		// Mips arch variants
 		Mips_rev6 interface{} `blueprint:"filter(android:\"arch_variant\")"`