Remove hard coded ROCm path in rdc.service

The executable rdcd was using an absolute path in rdc.service. Using update-alternatives gives the flexibility to invoke the binary from anywhere and no absolute path is required.

Change-Id: I2f3d6fcbf9dd854870cfc2e00532c504ce6cd6fc

server/rdc.service.in

@@ -23,8 +23,9 @@ AmbientCapabilities=CAP_DAC_OVERRIDE
 
 # If we need to start anything before rdcd, use this
 # ExecStartPre=
-
-ExecStart=/@CPACK_PACKAGING_INSTALL_PREFIX@/@CMAKE_INSTALL_BINDIR@/rdcd
+# update-alternative has been run for rdcd and
+# soft link will be available in usr/bin
+ExecStart=rdcd
 
 # If we need to start anything after rdcd use this
 # ExecStartPost=