subprojects: Add phosphor-logging wrap
Addresses the following error:
```
$ meson setup build
...
Dependency hei from subproject subprojects/libhei found: YES 0.1
Run-time dependency phosphor-logging found: NO (tried pkgconfig and cmake)
Looking for a fallback subproject for the dependency phosphor-logging
meson.build:62:23: ERROR: Neither a subproject directory nor a phosphor-logging.wrap file was found.
```
Change-Id: I8b933009a4a282a7c0defcd672986aeeff0bdf2a
Signed-off-by: Andrew Jeffery <andrew@codeconstruct.com.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