x86/tools: insn_sanity.c: Emit standard build success messages

The standard 'success' output of insn_decoder_test spams build logs with:

  arch/x86/tools/insn_sanity: Success: decoded and checked 1000000 random instructions with 0 errors (seed:0x2e263877)

Prefix the message with the standard '  ' (two spaces) used by kbuild
to denote regular build messages, making it easier for tools to
filter out warnings and errors.

Signed-off-by: Ingo Molnar <[email protected]>
Signed-off-by: Borislav Petkov (AMD) <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: David Woodhouse <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Jürgen Groß <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Masahiro Yamada <[email protected]>
Cc: Michal Marek <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Vitaly Kuznetsov <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: Ingo Molnar

arch/x86/tools/insn_sanity.c

@@ -253,9 +253,9 @@ int main(int argc, char **argv)
 	}
 
 	fprintf((errors) ? stderr : stdout,
-		"%s: %s: decoded and checked %d %s instructions with %d errors (seed:0x%x)\n",
+		"  %s: %s: Decoded and checked %d %s instructions with %d errors (seed:0x%x)\n",
 		prog,
-		(errors) ? "Failure" : "Success",
+		(errors) ? "failure" : "success",
 		insns,
 		(input_file) ? "given" : "random",
 		errors,