Build Jenkins ASan/UBSan bot with --enable-firebird-sdbc

...now that 14955ed91b282ccbb395cb47c6d76e3b42b34748 "external/firebird: Support
Clang ASan" allows to

Change-Id: I339ec464a085853e1b6789a544b8f64932f1322d
diff --git a/distro-configs/Jenkins/Linux_ubsan_master.conf b/distro-configs/Jenkins/Linux_ubsan_master.conf
index 4633800..5a58959 100644
--- a/distro-configs/Jenkins/Linux_ubsan_master.conf
+++ b/distro-configs/Jenkins/Linux_ubsan_master.conf
@@ -24,5 +24,4 @@
--without-system-libxml
--without-system-zlib
--disable-compiler-plugins
--disable-firebird-sdbc
--disable-gtk3