.lgtm.yml: Add package deps

I was recently looking at systemd's CI and came across this.
AFAICS it's a proprietary analysis but it looks useful.

We still have `clang-analyzer` for example for FOSS analysis.

.lgtm.yml

@@ -0,0 +1,40 @@
+# See https://lgtm.com/
+extraction:
+  cpp:
+    prepare:
+      packages:
+      - "autoconf-archive"
+      - "libcurl4-openssl-dev"
+      - "libjson-c-dev"
+      - "libssl-dev"
+      - "acl"
+      - "attr"
+      - "bison"
+      - "cpio"
+      - "debhelper"
+      - "dh-autoreconf"
+      - "dh-systemd"
+      - "docbook-xml"
+      - "docbook-xsl"
+      - "e2fslibs-dev"
+      - "elfutils"
+      - "fuse"
+      - "gjs"
+      - "gnome-desktop-testing"
+      - "gobject-introspection"
+      - "gtk-doc-tools"
+      - "libarchive-dev"
+      - "libattr1-dev"
+      - "libcap-dev"
+      - "libfuse-dev"
+      - "libgirepository1.0-dev"
+      - "libglib2.0-dev"
+      - "libgpgme11-dev"
+      - "liblzma-dev"
+      - "libmount-dev"
+      - "libselinux1-dev"
+      - "libsoup2.4-dev"
+      - "libcurl4-openssl-dev"
+      - "procps"
+      - "zlib1g-dev"
+      - "python3-yaml"