After we fixed bundled libyaml to correctly print 4-byte Unicode
characters, it is no longer compatible with the upstream version, so
enable building with bundled libyaml for every platform.
This way the tests will pass.

Follow-up #4090

This patch removes following source files regeneration:
  1. keywordhash.h
  2. opcodes.[hc]
  3. parse.[hc]
  4. sqlite3.h
adding them to the source tree.

To re-generate them (p.p. 1-3) one must pass
-DSQL_MAINTAINER_MODE=ON option to cmake. Files will be
copied to source tree automatically iif actual difference will
be detected.

As far we don't need such platform variety - remove sqlite3.h
re-generation at all.
Remove TCL script responsible for generation and template header
as well.

Compilation of auxilary SQL tools was also moved under this option:
  1. Lemon parser
  2. mkkeywordhash
since they redundant in non-maintainer mode.

Finally it removes dependency on TCL from all Tarantool package
variants.

Remove sqliteConfig.h, we don't use it.

SQLite uses TCL shell to generate common headers.
Add dependency in Travis to TCL shell for linux targets.
OSX comes with TCL pre-installed - no need to add dependency.

	* .travis.mk (deps_linux): Add tcl.

sql: Add dependency to TCL in packages.

As far as SQLite sources depend on TCLsh we need to
add dependency to TCL in package info.

	* debian/control: Add dependency on TCL.
	* rpm/tarantool.spec: Ditto.
	* snapcraft.yaml: Ditto.

sql: Avoid multiline string to satisfy older cmake

RHEL uses some old cmake which doesn't work with long string
which span over few lines w/ '\' terminator. Make it single line.

	* src/box/CMakeLists.txt (set_source_files_properties): Use
	single line instead of vreaks w/ '\'.

A new way to install Tarantool on Linux:

    snap install tarantool --channel=edge

See http://snapcraft.io for details.

Closes #1714