add dolt_commits and dolt_commit_ancestors to dolt ls --all

bats/system-tables.bats

@@ -23,6 +23,8 @@ teardown() {
     run dolt ls --all
     [ $status -eq 0 ]
     [[ "$output" =~ "dolt_log" ]] || false
+    [[ "$output" =~ "dolt_commits" ]] || false
+    [[ "$output" =~ "dolt_commit_ancestors" ]] || false
     [[ "$output" =~ "dolt_conflicts" ]] || false
     [[ "$output" =~ "dolt_branches" ]] || false
     [[ "$output" =~ "dolt_query_catalog" ]] || false

go/libraries/doltcore/doltdb/system_table.go

@@ -136,6 +136,8 @@ var generatedSystemTables = []string{
 	BranchesTableName,
 	LogTableName,
 	TableOfTablesInConflictName,
+	CommitsTableName,
+	CommitAncestorsTableName,
 }
 
 var generatedSystemTablePrefixes = []string{