Declare dependency on sanitizer runtime libraries

Moving the last users of a sanitizer runtime library to soong was
causing the runtime library to stop getting installed.  Declare
the dependency so make keeps installing it.

Test: builds
Change-Id: Ieeb9ad5c04ac8df0d1a74239da393dac5cab2b03
diff --git a/cc/config/toolchain.go b/cc/config/toolchain.go
index 5270437..fc0282b 100644
--- a/cc/config/toolchain.go
+++ b/cc/config/toolchain.go
@@ -212,7 +212,7 @@
 	if arch == "" {
 		return ""
 	}
-	return "libclang_rt." + sanitizer + "-" + arch + "-android.so"
+	return "libclang_rt." + sanitizer + "-" + arch + "-android"
 }
 
 func AddressSanitizerRuntimeLibrary(t Toolchain) string {