build: install into bin instead of sbin

Installs into bin instead of sbin per guidelines.

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: I531a49074ef8c5a7e63614d23feed64b17356cad
diff --git a/ipmb.service b/ipmb.service
index a940e1e..5e8c6cc 100644
--- a/ipmb.service
+++ b/ipmb.service
@@ -3,10 +3,10 @@
 After=phosphor-ipmi-host.service
 
 [Service]
-ExecStart=/usr/sbin/ipmbbridged
+ExecStart=/usr/bin/ipmbbridged
 SyslogIdentifier=ipmbbridged
 Restart=always
 Type=simple
 
 [Install]
-WantedBy=basic.target
\ No newline at end of file
+WantedBy=basic.target