build: add a non-autogenerated file which is required

For some reason some .gitignore, default setting or something ignores
some .in files - cairo.pc.in was safely pushed up to git, but the
cairo-uninstalled.pc.in file was not.

Add a .gitignore entry to make sure it is never "excluded" again and
get it into the tree.

Signed-off-by: Matt Sealey <matt@genesi-usa.com>
build: add back more non-generated files that git failed to 'add'

Signed-off-by: Matt Sealey <matt@genesi-usa.com>
debian: new cairo requires libxext-dev to compile properly

Signed-off-by: Matt Sealey <matt@genesi-usa.com>
debian: build the tee backend and update symbols to match

"tee" is required by such fancy applications as Firefox..

Signed-off-by: Matt Sealey <matt@genesi-usa.com>
gitignore: add build-generated files to debian/.gitignore

Signed-off-by: Matt Sealey <matt@genesi-usa.com>