Bug#739988: Fix autopkgtest missing dependencies and locale

debian/tests/control: Add missing build-essential, fakeroot, and wget test
dependencies.

debian/tests/run-tests: Pin locale to C to avoid test failures in other
locales.

debian/tests/control

@@ -1,3 +1,3 @@
 Tests: run-tests
 Restrictions: allow-stderr 
-Depends: @, dpkg-dev, debhelper, libdb-dev, gettext, libcurl4-gnutls-dev, zlib1g-dev, libbz2-dev, xsltproc, docbook-xsl, docbook-xml, po4a, autotools-dev, autoconf, automake, doxygen, debiandoc-sgml, stunnel4, libdb-dev
+Depends: @, build-essential, fakeroot, wget, dpkg-dev, debhelper, libdb-dev, gettext, libcurl4-gnutls-dev, zlib1g-dev, libbz2-dev, xsltproc, docbook-xsl, docbook-xml, po4a, autotools-dev, autoconf, automake, doxygen, debiandoc-sgml, stunnel4, libdb-dev

debian/tests/run-tests

@@ -2,6 +2,9 @@
 
 set -e
 
+unset LANGUAGE
+export LC_ALL=C
+
 # we need the buildin webserver for the tests
 if [ ! -e environment.mak ]; then
     make startup