meson: Use boost as a dependency

Currently boost library is found via the 'cpp.find_library' call. With
this method local build of the project requires host to have the boost
libraries installed.
Since the meson have a subproject system to download missing
dependencies, rewrite boost requirement to a 'dependency' object. This
way it would be possible to build the project locally on the system
without the boost library installed.

Tested:
Both local meson build and Yocto build are performed successfully.

Change-Id: I082aeb1d6c09627ea53f58cb6cd375f080401d57
Signed-off-by: Konstantin Aladyshev <aladyshev22@gmail.com>
diff --git a/libipmid/meson.build b/libipmid/meson.build
index e573ed4..ebd932c 100644
--- a/libipmid/meson.build
+++ b/libipmid/meson.build
@@ -1,5 +1,5 @@
 ipmid_pre = [
-  boost_coroutine,
+  boost,
   phosphor_dbus_interfaces_dep,
   phosphor_logging_dep,
   sdbusplus_dep,