[Packaging] Pass --no-keep-memory to ld by default.

When building Crosswalk (Chromium, in fact) on an IVI chroot, ld ends up
running out of memory.

Work around the issue by passing --no-keep-memory to ld so that it optimizes
for memory consumption over speed. I have not noticed any significant drop
in speed, though.

Do not add any checks for IVI as it does not hurt to have this on all
profiles.
[Packaging] Be compatible with multiple Tizen versions and profiles.

Prepare for the future and start detecting features and versions so that we
can support other Tizen versions and profiles besides Tizen 2.1 Mobile.

Checking for specific profiles is not very future-proof. We therefore try to
look for either specific features that may be enabled in the current profile
(such as Wayland support) or for a certain Tizen major version (the
differences betwen Tizen 2 and Tizen 3 are big enough that we need different
patches and build dependencies, for example).
[Packaging] Add a Mesa patch for Wayland when building for Tizen.

Import a patch from the Ozone-Wayland repository to prevent crashes when
using Mesa and Ozone caused by the way Chromium has GL headers in both
third_party/khronos and third_party/mesa and the wrong ones (with wrong
pointer sizes) may be picked up.

This patch should actually be used by anyone testing Chromium on Wayland,
but this would require us to have a Chromium Mesa fork of our own. For now,
then, we're going to apply it automatically only for Tizen and try to solve
the issue upstream. It is tracked by http://crbug.com/266310
Merge pull request #1459 from rakuco/tizen-ivi-support

[Packaging] Add all necessary spec file changes to support Tizen IVI.