IVGCVSW-5165 add the fmt library to third-party folder

Change-Id: I5519ce6c7811152a6b534898b9fdbaf5214c28d5
Signed-off-by: Jim Flynn <jim.flynn@arm.com>
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 13b4765..556beb7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -555,6 +555,9 @@
     src/profiling/backends/BackendProfiling.cpp
     src/profiling/backends/BackendProfiling.hpp
     third-party/cxxopts/cxxopts.hpp
+    third-party/fmt/core.h
+    third-party/fmt/format.h
+    third-party/fmt/format-inl.h
     third-party/ghc/filesystem.hpp
     third-party/half/half.hpp
     )