fix typo on previous commit

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45310 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

configure.in

@@ -2828,7 +2828,7 @@ fi
 AS_CASE(["$target_os"],
 [freebsd*], [
     AC_CHECK_LIB([procstat], [procstat_open_sysctl])
-    fi])
+    ])
 AS_CASE(["$target_cpu-$target_os"],
 [*-darwin*], [
     AC_CHECK_HEADERS([execinfo.h])