[lgtm]: Add LGTM yml

Signed-off-by: Ze Gan <ganze718@gmail.com>

lgtm.yml

@@ -0,0 +1,37 @@
+extraction:
+  cpp:
+    prepare:
+      packages:
+      - "qtbase5-dev"
+      - "libssl-dev"
+      - "dbus"
+      - "libdbus-1-dev"
+      - "libdbus-glib-1-2"
+      - "libdbus-glib-1-dev"
+      - "libreadline-dev"
+      - "libncurses5-dev"
+      - "libpcsclite-dev"
+      - "docbook-to-man"
+      - "docbook-utils"
+      - "libxml-simple-perl"
+      - "aspell"
+      - "aspell-en"
+      - "libhiredis-dev"
+      - "libnl-3-dev"
+      - "libnl-genl-3-dev"
+      - "libnl-route-3-dev"
+      - "libnl-nf-3-dev"
+      - "swig3.0"
+      - "libpython2.7-dev"
+      - "libgtest-dev"
+      - "dh-exec"
+      - "libzmq3-dev"
+      - "libzmq5"
+    after_prepare:
+    - "ls -l"
+    - "git clone https://github.com/Azure/sonic-swss-common; pushd sonic-swss-common;\
+      \ ./autogen.sh; fakeroot dpkg-buildpackage -us -uc -b; popd"
+    - "dpkg-deb -x libswsscommon_1.0.0_amd64.deb $LGTM_WORKSPACE"
+    - "dpkg-deb -x libswsscommon-dev_1.0.0_amd64.deb $LGTM_WORKSPACE"
+    index:
+      build_command: "pushd wpa_supplicant; cp defconfig .config; make; popd"