soong: add cortex-a73 to microarchitecture list

* Was missed in I3325f60add7f424f8cca53c22919fc481ef5e787

Change-Id: I24d1ef38922cb8f46c9136018cce6a22293ca95e
diff --git a/android/arch.go b/android/arch.go
index 51fc444..effd5a6 100644
--- a/android/arch.go
+++ b/android/arch.go
@@ -882,10 +882,12 @@
 		{"arm", "armv7-a-neon", "cortex-a15", []string{"armeabi-v7a"}},
 		{"arm", "armv7-a-neon", "cortex-a53", []string{"armeabi-v7a"}},
 		{"arm", "armv7-a-neon", "cortex-a53.a57", []string{"armeabi-v7a"}},
+		{"arm", "armv7-a-neon", "cortex-a73", []string{"armeabi-v7a"}},
 		{"arm", "armv7-a-neon", "denver", []string{"armeabi-v7a"}},
 		{"arm", "armv7-a-neon", "krait", []string{"armeabi-v7a"}},
 		{"arm", "armv7-a-neon", "kryo", []string{"armeabi-v7a"}},
 		{"arm64", "armv8-a", "cortex-a53", []string{"arm64-v8a"}},
+		{"arm64", "armv8-a", "cortex-a73", []string{"arm64-v8a"}},
 		{"arm64", "armv8-a", "denver64", []string{"arm64-v8a"}},
 		{"arm64", "armv8-a", "kryo", []string{"arm64-v8a"}},
 		{"mips", "mips32-fp", "", []string{"mips"}},