regulators: Create exception_utils namespace

This namespace contains utility functions for handling exceptions.

Signed-off-by: Shawn McCarney <shawnmm@us.ibm.com>
Change-Id: Ie945c7882cdede398af56dcd2d2c3c9c70320e92
diff --git a/phosphor-regulators/src/meson.build b/phosphor-regulators/src/meson.build
index aa8921c..d8616f6 100644
--- a/phosphor-regulators/src/meson.build
+++ b/phosphor-regulators/src/meson.build
@@ -7,6 +7,7 @@
     'chassis.cpp',
     'config_file_parser.cpp',
     'device.cpp',
+    'exception_utils.cpp',
     'id_map.cpp',
     'pmbus_utils.cpp',
     'system.cpp',