tracing/x86: Derive arch from bits argument in recordmcount.pl

Let the arch argument be overruled by bits. Otherwise, building of
external modules against a i386 target on a x86-64 host (and likely vice
versa as well) fails unless ARCH=i386 is explicitly passed to make.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
LKML-Reference: <4B4AFE10.8050109@siemens.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

scripts/recordmcount.pl

@@ -194,7 +194,7 @@ sub check_objcopy
     }
 }
 
-if ($arch eq "x86") {
+if ($arch =~ /(x86(_64)?)|(i386)/) {
     if ($bits == 64) {
 	$arch = "x86_64";
     } else {