Bug#933080: pekka-kana-2 FTCBFS: uses build architecture build tools

[Helmut Grohne]

Source: pekka-kana-2
Version: 1.2.2-2
Tags: patch upstream
User: debian-cross at lists.debian.org
Usertags: ftcbfs

pekka-kana-2 fails to cross build from source. The upstream Makefile
hard codes the build architecture pkg-config and it uses the
non-standard variable CPP for storing the C++ compiler while CXX would
be more common and supplied by debhelper. The attached patch makes
pkg-config substitutable and renames CPP to CXX. Please consider
applying it.

Helmut