meson: Fix meson builds

When building the project from scratch (from a new workstation without
docker) I found that there were dependencies missing. Fixed them up.

Tested: Was able to build " tools/" and "bmc/"

Signed-off-by: Brandon Kim <brandonkim@google.com>
Change-Id: Id2250c481a37d3cd4ed6915b1b2b0978df6e4649
diff --git a/tools/meson.build b/tools/meson.build
index 826d04c..58fff65 100644
--- a/tools/meson.build
+++ b/tools/meson.build
@@ -5,7 +5,8 @@
   dependency('pciaccess', fallback: ['pciaccess', 'dep_pciaccess']),
   dependency('stdplus', fallback: ['stdplus', 'stdplus_dep']),
   blobs_dep,
-  sys_dep]
+  sys_dep,
+  function2_dep]
 
 updater_lib = static_library(
   'updater_lib',