add logic to include avhrr in radstat tarball (NOAA-EMC#4337)

This adds logic to `exglobal_diag.sh` to include avhrr in the radstat
tarball.

Author: RussTreadon-NOAA

dev/scripts/exglobal_diag.sh

@@ -150,6 +150,11 @@ for loop in ${loops}; do
     while [[ ${n} -lt ${ntype} ]]; do
         n=$((n + 1))
         for type in ${diagtype[n]}; do
+            if [[ "${type}" == *"avhrr"* ]]; then
+                platform="${type##avhrr[23]}"
+                atype="avhrr${platform}"
+                type="$atype"
+            fi
             #shellcheck disable=SC2012,SC2312
             count=$(ls dir.*/"${type}_${loop}"* 2> /dev/null | wc -l)
             if [[ ${count} -eq 0 ]]; then