Update primary SRC field based on callout list

Signed-off-by: Zane Shelley <zshelle@us.ibm.com>
Change-Id: I41f3eda5c27b8ec74d6329b8f145181f400547f8
diff --git a/meson.build b/meson.build
index deee608..6ee92ce 100644
--- a/meson.build
+++ b/meson.build
@@ -61,6 +61,8 @@
 
 libpdbg_dep = cmplr.find_library('pdbg')
 
+fmt_dep = dependency('fmt')
+
 if get_option('phal').enabled()
   libphal_dep = cmplr.find_library('phal')
 endif