meson: Provide wrap file for boost

Currently local build on the system without boost can fail with
the following message:
"""
meson.build: ERROR: Dependency "boost" not found, tried system
"""
Provide "boost.wrap" file to fix the issue.

Change-Id: I97f1e5542b7b097de8241d68dd021f44b7e3e5f4
Signed-off-by: Konstantin Aladyshev <aladyshev22@gmail.com>
diff --git a/.gitignore b/.gitignore
index 22d836c..bf72bf2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,5 @@
 /subprojects/*
 !subprojects/sdbusplus.wrap
 !subprojects/phosphor-logging.wrap
+!subprojects/boost.wrap
+!subprojects/packagefiles