[tests] update timeout for minimal tests

lustrec_tests/minimal_tests_O1/dune

@@ -10,4 +10,4 @@
    (glob_files *.lus))
   (:ign ignored))
  (action
-  (run %{test} %{bin:lustrec} "%{lus}" %{ign} "minimal_tests" 60 "O1")))
+  (run %{test} %{bin:lustrec} "%{lus}" %{ign} "minimal_tests" 240 "O1")))

lustrec_tests/minimal_tests_O2/dune

@@ -10,4 +10,4 @@
    (glob_files *.lus))
   (:ign ignored))
  (action
-  (run %{test} %{bin:lustrec} "%{lus}" %{ign} "minimal_tests" 60 "O2")))
+  (run %{test} %{bin:lustrec} "%{lus}" %{ign} "minimal_tests" 240 "O2")))

lustrec_tests/minimal_tests_O3/dune

@@ -10,4 +10,4 @@
    (glob_files *.lus))
   (:ign ignored))
  (action
-  (run %{test} %{bin:lustrec} "%{lus}" %{ign} "minimal_tests" 60 "O3")))
+  (run %{test} %{bin:lustrec} "%{lus}" %{ign} "minimal_tests" 240 "O3")))

lustrec_tests/minimal_tests_wo_optimizations/dune

@@ -10,4 +10,4 @@
    (glob_files *.lus))
   (:ign ignored))
  (action
-  (run %{test} %{bin:lustrec} "%{lus}" %{ign} "minimal_tests" 60 "O-1")))
+  (run %{test} %{bin:lustrec} "%{lus}" %{ign} "minimal_tests" 240 "O-1")))