Rename dig reference files in the rrsetorder test

bin/tests/system/rrsetorder/dig.out* files match a gitignore expression
present in bin/tests/system/.gitignore.  Since these are meant to be
reference files that are compared to the files generated when the
"rrsetorder" system test is run, rename them to avoid listing tracked
files in .gitignore files.

bin/tests/system/rrsetorder/tests.sh

@@ -41,7 +41,7 @@ if $test_fixed; then
     for i in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
     do
     dig_cmd @10.53.0.1 fixed.example > dig.out.fixed || ret=1
-    diff dig.out.fixed dig.out.fixed.good >/dev/null || ret=1
+    diff dig.out.fixed reference.dig.out.fixed.good >/dev/null || ret=1
     done
     if [ $ret != 0 ]; then echo_i "failed"; fi
     status=$((status + ret))
@@ -133,7 +133,7 @@ do
     match=0
     for j in $GOOD_RANDOM
     do
-	eval "diff dig.out.random dig.out.random.good$j >/dev/null && match$j=1 match=1"
+	eval "diff dig.out.random reference.dig.out.random.good$j >/dev/null && match$j=1 match=1"
 	if [ $match -eq 1 ]; then break; fi
     done
     if [ $match -eq 0 ]; then ret=1; fi
@@ -172,7 +172,7 @@ if $test_fixed; then
     for i in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
     do
     dig_cmd @10.53.0.2 fixed.example > dig.out.fixed || ret=1
-    diff dig.out.fixed dig.out.fixed.good || ret=1
+    diff dig.out.fixed reference.dig.out.fixed.good || ret=1
     done
     if [ $ret != 0 ]; then echo_i "failed"; fi
     status=$((status + ret))
@@ -242,7 +242,7 @@ do
     match=0
     for j in $GOOD_RANDOM
     do
-	eval "diff dig.out.random dig.out.random.good$j >/dev/null && match$j=1 match=1"
+	eval "diff dig.out.random reference.dig.out.random.good$j >/dev/null && match$j=1 match=1"
 	if [ $match -eq 1 ]; then break; fi
     done
     if [ $match -eq 0 ]; then ret=1; fi
@@ -297,7 +297,7 @@ if $test_fixed; then
     for i in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
     do
     dig_cmd @10.53.0.2 fixed.example > dig.out.fixed || ret=1
-    diff dig.out.fixed dig.out.fixed.good || ret=1
+    diff dig.out.fixed reference.dig.out.fixed.good || ret=1
     done
     if [ $ret != 0 ]; then echo_i "failed"; fi
     status=$((status + ret))
@@ -367,7 +367,7 @@ do
     match=0
     for j in $GOOD_RANDOM
     do
-	eval "diff dig.out.random dig.out.random.good$j >/dev/null && match$j=1 match=1"
+	eval "diff dig.out.random reference.dig.out.random.good$j >/dev/null && match$j=1 match=1"
 	if [ $match -eq 1 ]; then break; fi
     done
     if [ $match -eq 0 ]; then ret=1; fi
@@ -406,7 +406,7 @@ if $test_fixed; then
     for i in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
     do
     dig_cmd @10.53.0.3 fixed.example > dig.out.fixed || ret=1
-    diff dig.out.fixed dig.out.fixed.good || ret=1
+    diff dig.out.fixed reference.dig.out.fixed.good || ret=1
     done
     if [ $ret != 0 ]; then echo_i "failed"; fi
     status=$((status + ret))
@@ -480,7 +480,7 @@ do
     match=0
     for j in $GOOD_RANDOM
     do
-	eval "diff dig.out.random dig.out.random.good$j >/dev/null && match$j=1 match=1"
+	eval "diff dig.out.random reference.dig.out.random.good$j >/dev/null && match$j=1 match=1"
 	if [ $match -eq 1 ]; then break; fi
     done
     if [ $match -eq 0 ]; then ret=1; fi
@@ -522,7 +522,7 @@ do
     match=0
     for j in $GOOD_RANDOM
     do
-	eval "diff dig.out.random dig.out.random.good$j >/dev/null && match$j=1 match=1"
+	eval "diff dig.out.random reference.dig.out.random.good$j >/dev/null && match$j=1 match=1"
 	if [ $match -eq 1 ]; then break; fi
     done
     if [ $match -eq 0 ]; then ret=1; fi