Merge branch 'sg/ci-libsvn-perl'

To run tests for Git SVN, our scripts for CI used to install the
git-svn package (in the hope that it would bring in the right
dependencies).  This has been updated to install the more direct
dependency, namely, libsvn-perl.

* sg/ci-libsvn-perl:
  ci: install 'libsvn-perl' instead of 'git-svn'

ci/install-dependencies.sh

@@ -12,7 +12,7 @@ case "$jobname" in
 linux-clang|linux-gcc)
 	sudo apt-add-repository -y "ppa:ubuntu-toolchain-r/test"
 	sudo apt-get -q update
-	sudo apt-get -q -y install language-pack-is git-svn apache2
+	sudo apt-get -q -y install language-pack-is libsvn-perl apache2
 	case "$jobname" in
 	linux-gcc)
 		sudo apt-get -q -y install gcc-8