capture-libs test: Cope with i686, cmov CPU capability flags

Signed-off-by: Simon McVittie <smcv@collabora.com>

tests/capture-libs.pl

@@ -33,7 +33,7 @@ use CapsuleTest;
 
 skip_all_unless_bwrap;
 
-my $LIBDIR = qr{/(?:usr/)?lib(?:32|64|x32)?(?:/\w+-linux-gnu\w*)?};
+my $LIBDIR = qr{/(?:usr/)?lib(?:32|64|x32)?(?:/\w+-linux-gnu\w*)?(?:/i686)?(?:/cmov)?};
 
 my $test_tempdir = File::Temp->newdir();
 diag "Working directory: $test_tempdir";