This adds two new tests for g_bytes_new_from_bytes().
One test ensures that when creating a new GBytes that is a slice of
the entire base bytes, we just return the base bytes with it's reference
count incremented by one.
The other test ensures that when performing sub-slices of GBytes, for
which the parent GBytes also references a GBytes, that we skip the
intermediate GBytes and reference the base GBytes. Additional testing
of the internal state of the GBytes structure is performed to prove
the correctness of the implementation.
https://bugzilla.gnome.org/show_bug.cgi?id=792780
* Represents an immutable reference counted block of memory.
* This is basically the internal glib GBuffer structure exposed,
renamed, and with some additional capabilities.
* The GBytes name comes from python3's immutable 'bytes' type
* GBytes can be safely used as keys in hash tables, and have
functions for doing so: g_bytes_hash, g_bytes_equal
* GByteArray is a mutable form of GBytes, and vice versa. There
are functions for converting from one to the other efficiently:
g_bytes_unref_to_array() and g_byte_array_free_to_bytes()
* Adds g_byte_array_new_take() to support above functions
https://bugzilla.gnome.org/show_bug.cgi?id=663291
