change install rpath to (#1237)

Author: rkimballn1

CMakeLists.txt

@@ -105,7 +105,7 @@ set(NGRAPH_INSTALL_LIB "${CMAKE_INSTALL_PREFIX}/lib")
 set(NGRAPH_INSTALL_INCLUDE "${CMAKE_INSTALL_PREFIX}/include")
 set(NGRAPH_INSTALL_DOC "${CMAKE_INSTALL_PREFIX}/doc")
 set(NGRAPH_INSTALL_BIN "${CMAKE_INSTALL_PREFIX}/bin")
-set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib")
+set(CMAKE_INSTALL_RPATH "$ORIGIN")
 
 #-----------------------------------------------------------------------------------------------
 # Compiler-specific logic...