build: check for experimental/filesystem

Check for experimental/filesystem instead of experimental/any

Change-Id: Icf6556f9f6988cc14c70db4d0c367f246fdc802a
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/configure.ac b/configure.ac
index 46fa1b6..3da993d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -27,7 +27,7 @@
 PKG_CHECK_MODULES([PHOSPHOR_LOGGING], [phosphor-logging], ,[AC_MSG_ERROR([The openbmc/phosphor-logging package is required])])
 PKG_CHECK_MODULES([PHOSPHOR_DBUS_INTERFACES], [phosphor-dbus-interfaces], [], [AC_MSG_ERROR(["phosphor-dbus-interfaces required and not found."])])
 AC_CHECK_HEADER([host-ipmid], [AC_MSG_ERROR(["phosphor-host-ipmid required and not found."])])
-AC_CHECK_HEADER(experimental/any, ,[AC_MSG_ERROR([Could not find experimental/any...libstdc++fs development package required])])
+AC_CHECK_HEADER(experimental/filesystem, ,[AC_MSG_ERROR([Could not find experimental/filesystem...libstdc++fs development package required])])
 PKG_CHECK_MODULES([LIBCONFIGXX], [libconfig++ >= 1.5], ,AC_MSG_ERROR([libconfig++ 1.5 or newer not found.]))
 AX_PTHREAD([], [AC_MSG_ERROR(["pthread required and not found"])])