fix arch detection

(cherry picked from commit 19d9d50b12)

php-phpunit-php-timer5.spec

@@ -81,13 +81,14 @@ touch vendor/autoload.php
 
 : Run upstream test suite
 ret=0
+if [ $(php -r 'echo PHP_INT_SIZE;') -lt 8 ]; then
+  filter="--filter '^((?!(testCanBeFormattedAsString)).)*$'"
+fi
 for cmd in php php73 php74 php80; do
   if which $cmd; then
     $cmd -d auto_prepend_file=%{buildroot}%{php_home}/%{ns_vendor}/%{ns_project}%{major}/autoload.php \
       %{_bindir}/phpunit9 \
-%if %{__isa_bits} < 64
-        --filter '^((?!(testCanBeFormattedAsString)).)*$' \
-%endif
+        $filter  \
         --verbose || ret=1
   fi
 done