SIZEOF_SIZE_T might be only defined in config.h.

Include config.h for these systems to pass tests which are only
supposed to be run on 32 bit systems.

Fixes issue #666.

The array_list_new2 function, which is externally reachable through
json_object_new_array_ext, does not check if specified initial size
actually fits into memory on 32 bit architectures.

It also allows negative values, which could lead to an overflow on these
architectures as well. I have added test cases for these situations.

While at it, also protect array_list_shrink against too large
empty_slots argument. No test added because it takes a huge length
value, therefore a lot of items within the array, to overflow the
calculation. In theory this affects 64 bit sytems as well, but since the
arraylist API is not supposed to be used by external applications
according to its header file, the call is protected due to int
limitation of json_object_array_shrink.

Add a test that triggers the problem to ensure it stays fixed.

Conflicts:
	tests/test_util_file.c

The test is implied in test1.

The idea is to check that the returned lengths and strings
are identical to what is expected to return the already
tested function 'json_object_to_json_string_ext'.

Signed-off-by: José Bollo <jose.bollo@iot.bzh>

Change %d to %llu and add cast to unsigned long long for size_t arguments,
otherwise compilation will fail with errors like:

test1.c:70:15: error: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘size_t {aka long unsigned int}’ [-Werror=format=]

%zu is avoided to stay compatible with old libc versions (like old Visual
Studio).

Tests added.

Extend the run_output_test() function so we actually can pass command line
 parameters and so we can support different output files for the same test
 executable.
Also provide some hints about what to do if a test fails (i.e. set VERBOSE=1).