Bug#1112293: klystrack: please enable verbose build logs

[Emanuele Rocca <ema@debian.org>]

Source: klystrack
Version: 0.20171212-7

Hi,

currently klystrack does not include the full command line arguments passed to the
compiler and linker in its build logs. Here's a snippet as an example:

 make[4]: Entering directory '/build/reproducible-path/klystrack-0.20171212/klystron'
 Compiling cyd.c...
 Compiling cydchr.c...
 Compiling cydcrush.c...

Policy 4.9.1 says that the package build should be as verbose as
reasonably possible to make life easier for porters and bug squashers
more generally:
https://www.debian.org/doc/debian-policy/ch-source.html#main-building-script-debian-rules

Dropping the '@' from the Makefiles when invoking CC should be
sufficient.

Thanks,
  Emanuele