split readFRUContents() into FruUtils module

Splits the readFRUContents() method into its own module.  This utility
code can then be more easily tested without extra dependencies.

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: I1b8fa7179d7d0092e0236e8586f99c45121eca84
diff --git a/src/meson.build b/src/meson.build
index 4966ed2..8a9811b 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -26,6 +26,7 @@
         'fru-device',
         'FruDevice.cpp',
         'Utils.cpp',
+        'FruUtils.cpp',
         cpp_args: cpp_args_fd,
         dependencies: [
             boost,