Add a bigint test with --no_intrinsify.

tests/corelib/corelib.status

Index: tests/corelib/corelib.status
===================================================================
--- tests/corelib/corelib.status	(revision 41007)
+++ tests/corelib/corelib.status	(working copy)
@@ -106,7 +106,7 @@
 iterable_return_type_test/01: RuntimeError # Issue 20085
 iterable_return_type_test/02: RuntimeError # Dart2js does not support Uint64*.
 
-big_integer_vm_test: RuntimeError, OK # VM specific test.
+big_integer_*: Skip # VM specific test.
 bit_twiddling_bigint_test: RuntimeError # Requires bigint support.
 compare_to2_test: RuntimeError, OK    # Requires bigint support.
 string_base_vm_test: RuntimeError, OK # VM specific test.
@@ -152,13 +152,14 @@
 list_removeat_test: fail
 
 [ $arch == simarm || $arch == simarm64 ]
-big_integer_vm_test: Skip # Timeout. Issue 20879
+big_integer_parsed_*: Pass, Slow
 
 [ $arch == simmips ]
 int_parse_radix_test: Skip # Timeout
 
 [ $arch == simmips || $arch == mips ]
-big_integer_vm_test: Skip # Timeout. Issue 20879
+big_integer_parsed_*: Skip # Timeout. Issue 20879
+big_integer_huge_mul_vm_test: Skip # Timeout
 
 [ $arch == simarm && $checked ]
 num_parse_test: Skip  # Pass, Timeout