meson: update dependency

Add subprojects file and update .gitignore

Also, remove the test/Makefile.am file.

Signed-off-by: George Liu <liuxiwei@inspur.com>
Change-Id: I39be4b64d53d2aef1884ce0b7475c2cfc39c7ac4
diff --git a/subprojects/phosphor-logging.wrap b/subprojects/phosphor-logging.wrap
new file mode 100644
index 0000000..7d2901d
--- /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