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: I596524f744cbe4ed0d43f464d23c67fef8886ee9
Signed-off-by: Konstantin Aladyshev <aladyshev22@gmail.com>
diff --git a/.gitignore b/.gitignore
index f0bb217..b98ab09 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@
 build*/
 subprojects/*
 !subprojects/*.wrap
+!subprojects/packagefiles
 # indirect dependencies should be ignored
 subprojects/fmt.wrap
 subprojects/function2.wrap