Warn phosphor-webui is deprecated

phosphor-webui has been largely replaced by webui-vue, but a number of
users continue to expect that it should be their starting point
(possibly because p comes before w alphabetically?).

This commit adds a warning to the base recipe denoting that
phosphow-webui is deprecated, hopefully preventing some people from
going down the wrong path for too long.

Tested:
"bitbake phosphor-webui" shows the warning stated.

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: Ie29a44f7ca30f093be7c591fd945721d5365c2f9
diff --git a/meta-phosphor/recipes-phosphor/webui/phosphor-webui_git.bb b/meta-phosphor/recipes-phosphor/webui/phosphor-webui_git.bb
index f32cc1d..7282774 100644
--- a/meta-phosphor/recipes-phosphor/webui/phosphor-webui_git.bb
+++ b/meta-phosphor/recipes-phosphor/webui/phosphor-webui_git.bb
@@ -16,6 +16,7 @@
 FILES:${PN} += "${datadir}/www/*"
 
 do_compile () {
+    bbwarn "phosphor-webui is deprecated and has been replaced with webui-vue"
     cd ${S}
     rm -rf node_modules
     npm --loglevel info --proxy=${http_proxy} --https-proxy=${https_proxy} install