Resolve Meson issues

This commit includes fixes in the repo:

1. Moving experimental filesystem to filesystem
2. Errors that meson identified

Signed-off-by: Ratan Gupta <ratankgupta31@gmail.com>
Change-Id: I93c77c2a434275c4da3ca4549919eaa55b57f481
diff --git a/test/test_snmp_serialize.cpp b/test/test_snmp_serialize.cpp
index 1b0928e..627045b 100644
--- a/test/test_snmp_serialize.cpp
+++ b/test/test_snmp_serialize.cpp
@@ -4,7 +4,7 @@
 
 #include <netinet/in.h>
 
-#include <experimental/filesystem>
+#include <filesystem>
 #include <fstream>
 
 #include <gtest/gtest.h>
@@ -17,7 +17,7 @@
 {
 
 constexpr auto clientObjPath = "/xyz/openbmc_test/snmp/client";
-namespace fs = std::experimental::filesystem;
+namespace fs = std::filesystem;
 
 class TestSerialize : public testing::Test
 {