Put initial skeleton code of user manager

Change-Id: I4f95a8baf9348d9ed9b7e8b6b53a7a4e538b045e
Signed-off-by: Vishwanatha Subbanna <vishwa@linux.vnet.ibm.com>
diff --git a/Makefile.am b/Makefile.am
new file mode 100644
index 0000000..6fc724c
--- /dev/null
+++ b/Makefile.am
@@ -0,0 +1,4 @@
+sbin_PROGRAMS = phosphor-user-manager
+
+phosphor_user_manager_SOURCES = \
+                mainapp.cpp