ctf-reader: Fix array size representation

ctf-reader: Fix array size representation

A variable length array (VLA), or a flexible array member (with its
size set to zero to recognize such cases) is represented in the
libabigail IR as an array with "non-finite" length.  This is a way to
say that the length of the array is not statically known.

The ABIXML array-type-def element looks like:

<array-type-def dimensions='1' ... size-in-bits='infinite' ...>
    <subrange length='infinite' type-id='type-id-3' .../>
</array-type-def>

The patch teaches the ctf-reader to correctly set the size of the
array for VLAs.

	* src/abg-ctf-reader.cc (build_array_ctf_range): Use
	* tests/data/Makefile.am: Add new test.
	`upper_bound' and number of elements to indicate infinite
	array size.
	* tests/data/test-read-ctf/test-array-size.abi: New test.
	* tests/data/test-read-ctf/test-array-size.c: Likewise.
	* tests/data/test-read-ctf/test-array-size.o: Likewise.
	* tests/test-read-ctf.cc: Update testsuite.

Signed-off-by: Guillermo E. Martinez <guillermo.e.martinez@oracle.com>
Signed-off-by: Dodji Seketeli <dodji@redhat.com>