don't need FindBin if --disable-openssl used

Change-Id: I786ca760b8f4e606945acfc9b2667c2305c014d1
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/110378
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
diff --git a/configure.ac b/configure.ac
index 75f5543..e660733 100644
--- a/configure.ac
+++ b/configure.ac
@@ -5985,7 +5985,7 @@ fi
if test "$with_system_hsqldb" = "yes"; then
    perl_use_string="$perl_use_string ; use Archive::Zip"
fi
if test "$with_system_openssl" != "yes"; then
if test "$enable_openssl" = "yes" -a "$with_system_openssl" != "yes"; then
    # OpenSSL needs that to build
    perl_use_string="$perl_use_string ; use FindBin"
fi