qemu-arm: Don't compile tests in "REPL" mode.

Previous to this patch the qemu-arm tests were compiled with is_relp=true
meaning that the __repl_print__ function was called for all lines of code
in the outer scope.  This is not the right behaviour for scripts that are
executed as though they were a file (eg tests).

With this fix the micropython/heapalloc_str.py test now works so it is
removed from the test blacklist.

qemu-arm/test_main.c

@@ -32,7 +32,7 @@ inline void do_str(const char *src) {
     if (nlr_push(&nlr) == 0) {
         qstr source_name = lex->source_name;
         mp_parse_tree_t parse_tree = mp_parse(lex, MP_PARSE_FILE_INPUT);
-        mp_obj_t module_fun = mp_compile(&parse_tree, source_name, MP_EMIT_OPT_NONE, true);
+        mp_obj_t module_fun = mp_compile(&parse_tree, source_name, MP_EMIT_OPT_NONE, false);
         mp_call_function_0(module_fun);
         nlr_pop();
     } else {

tools/tinytest-codegen.py

@@ -49,7 +49,6 @@ testgroup_member = (
 test_dirs = ('basics', 'micropython', 'float', 'extmod', 'inlineasm') # 'import', 'io', 'misc')
 exclude_tests = (
     'float/float2int_doubleprec.py', # requires double precision floating point to work
-    'micropython/heapalloc_str.py',  # unknown
     'inlineasm/asmfpaddsub.py', 'inlineasm/asmfpcmp.py', 'inlineasm/asmfpldrstr.py', 'inlineasm/asmfpmuldiv.py', 'inlineasm/asmfpsqrt.py',
     'extmod/ticks_diff.py', 'extmod/time_ms_us.py', 'extmod/uheapq_timeq.py',
     'extmod/machine_pinbase.py', 'extmod/machine_pulse.py',