boost: define required dependency

Latest upstream yocto is failing due to being unable to find the boost
header files. Define the needed dependency.

This will require a DEPENDS update in phosphor-power_git.bb before it
will build:
https://gerrit.openbmc-project.xyz/c/openbmc/meta-phosphor/+/33014

Tested:
Verified with the corresponding recipe change that phosphor-power now
builds against upstream yocto

Change-Id: I382fae08ed2a525f39d1873ee1a2719fa85d9964
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/cold-redundancy/meson.build b/cold-redundancy/meson.build
index 1558de6..2595682 100644
--- a/cold-redundancy/meson.build
+++ b/cold-redundancy/meson.build
@@ -9,6 +9,7 @@
         sdbusplus,
         systemd,
         pthread,
+        boost,
     ],
     include_directories: [
         '.',