subprojects: Add phosphor-logging wrap

Change-Id: I6855c90cbfc16dbe31ee18acf9065ed83be122fc
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/subprojects/phosphor-logging.wrap b/subprojects/phosphor-logging.wrap
new file mode 100644
index 0000000..71eee8b
--- /dev/null
+++ b/subprojects/phosphor-logging.wrap
@@ -0,0 +1,6 @@
+[wrap-git]
+url = https://github.com/openbmc/phosphor-logging.git
+revision = HEAD
+
+[provide]
+phosphor-logging = phosphor_logging_dep