Remove from debian build:
* tokudb
* mroonga
* spider
* ograph
* embedded server

Add ccache to debian build.

Backport 10.3 changes to autobake-deb
that make travis faster.

Merge instructions:
Drop this commit on merge to 10.3

Leave debian/additions/mysqlreport as #!/usr/bin/perl

Acknowledge that `env perl` is a hack, a complete fix
needs to consider which path perl is at and insert into
these scripts.

The usefulness of these scripts is questionable.

On FreeBSD, perl isn't in /usr/bin, its in /usr/local/bin or
elsewhere in the path.

Like storage/{maria/unittest/,}ma_test_* , we use /usr/bin/env to
find perl and run it.

There is a 4 MB hard limit on Travis-CI and build output needs to be less
than that. Silencing the 'make install' step gets rid of a lot of
"Installing.." and "Missing.." and removing all mysql-test files will
make the dh_missing warnings much shorter.

Cherry-picked from 41952c85f1644690249ce624de7609cbebb93638.

when detecting running mysqld processes to stop,
ignore processes in different namespaces.

Cleanup install_layout to account for multi-arch setup and remove
redundant defines in debian rules.

Signed-off-by: Vicențiu Ciorbaru <vicentiu@mariadb.org>

The .pc file installed by mariadb mentions archful directories and
therefore must be archful itself.

This fixes MDEV-14340.