Try to fix debian slave by changing order of checks in configure

mythtv/configure

@@ -3848,9 +3848,6 @@ fi
 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
 
-# Attempt to use libudev for mediamonitor
-enabled libudev && check_lib2 libudev.h udev_new -ludev || disable libudev
-
 enabled ffmpeg_pthreads && enable pthreads
 
 # check for some common methods of building with pthread support
@@ -3882,6 +3879,9 @@ for thread in $THREADS_LIST; do
     fi
 done
 
+# Attempt to use libudev for mediamonitor
+enabled libudev && check_lib2 libudev.h udev_new -ludev || disable libudev
+
 check_lib math.h sin -lm && LIBM="-lm"
 disabled crystalhd || check_lib libcrystalhd/libcrystalhd_if.h DtsCrystalHDVersion -lcrystalhd || disable crystalhd
 disabled vaapi || check_lib va/va.h vaInitialize -lva