Add lgtm.yml to analyzse C code with LGTM

See https://lgtm.com/help/lgtm/customizing-file-classification

Signed-off-by: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>

.lgtm.yml

@@ -0,0 +1,60 @@
+---
+# See https://lgtm.com/help/lgtm/customizing-file-classification
+path_classifiers:
+  asn1:
+    - "asn1/.*"
+  asn1-autogenerated:
+    - "asn1/asn1c/.*"
+  ipaclient:
+    - client
+    - ipalcient
+    - util
+  ipalib:
+    - ipalib
+    - ipaplatform
+    - ipapython
+  ipaserver:
+    - ipaserver
+  ipatets:
+    - ipatests
+  daemons:
+    - daemons
+  install:
+    - install
+extraction:
+  cpp:
+    prepare:
+      packages:
+        - build-essential
+        - autoconf
+        - automake
+        - autopoint
+        - libtool
+        - gettext
+        - python-all-dev
+        - python3-distutils
+        - python3-setutools
+        - python3-lesscpy
+        - nodejs
+        - uglifyjs
+        - systemd
+        - libssl-dev
+        - libsasl2-dev
+        - libldap2-dev
+        - libkrb5-dev
+        - libkrad-dev
+        - libini-config-dev
+        - libnss3-dev
+        - libsss-certmap-dev
+        - libsss-idmap-dev
+        - libsss-nss-idmap-dev
+        - libunistring-dev
+        - libxmlrpc-core-c3-dev
+        - samba-dev
+        - uuid-dev
+    configure:
+      command:
+        - ./autogen.sh --with-ipaplatform=debian
+    index:
+      build_command:
+        - make -j2 -s

Makefile.am

@@ -253,6 +253,7 @@ rpmlint: freeipa.spec
 
 YAML_FILES = \
 	$(top_srcdir)/.travis.yml \
+	$(top_srcdir)/.lgtm.yml \
 	$(wildcard $(top_srcdir)/.*.yaml) \
 	$(wildcard $(top_srcdir)/ipatests/prci_definitions/*.yaml)