Cleanup the cpp-define-generator definitions.

Test: test-art-host-gtest-arch_test
Change-Id: Ifda7a51d19156b1eb62bc39b16ec559d609744e5
diff --git a/tools/cpp-define-generator/Android.bp b/tools/cpp-define-generator/Android.bp
index 0d3943e..027f128 100644
--- a/tools/cpp-define-generator/Android.bp
+++ b/tools/cpp-define-generator/Android.bp
@@ -41,7 +41,7 @@
     host_supported: true,
     device_supported: true,
     srcs: [":asm_defines.s"],
-    out: ["asm_support_gen.h"],
+    out: ["asm_defines.h"],
     tool_files: ["make_header.py"],
     cmd: "$(location make_header.py) \"$(in)\" > \"$(out)\"",
 }