evdevpp: Add evmon utility

Add a sample/test ev event monitor program for evdevpp.

Change-Id: I46dcc47b67b377a1abd79ceef3bc28dbf269d6f2
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/evdevpp/test/.gitignore b/evdevpp/test/.gitignore
index e69de29..707e6e5 100644
--- a/evdevpp/test/.gitignore
+++ b/evdevpp/test/.gitignore
@@ -0,0 +1 @@
+/evmon