tools/ci-install.sh: Use package=() style for local package list to avoid '\' notation

11 jobs for ci-dependency-fixes in 9 minutes and 33 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Build
passed #5773984
build:cmake

00:02:59

passed #5773981
build:debug

00:06:38

manual #5773986
allowed to fail manual
build:i686-w64-mingw32-cmake
passed #5773985
build:i686-w64-mingw32-debug

00:06:06

manual #5773983
allowed to fail manual
build:legacy
passed #5773980
build:production

00:03:50

manual #5773982
allowed to fail manual
build:reduced
manual #5773989
allowed to fail manual
build:stretch
passed #5773987
build:x86_64-w64-mingw32

00:04:06

passed #5773988
build:x86_64-w64-mingw32-cmake-debug

00:09:32

manual #5773990
allowed to fail manual
build:xenial