Improve CMake and relocate tests

- Respect CMAKE_INSTALL_PREFIX and ignore RDC_CLIENT_INSTALL_PREFIX
- Move example and rdctst from rocm/bin to rocm/share/rdc
- Add README for examples

Signed-off-by: Galantsev, Dmitrii <dmitrii.galantsev@amd.com>
Change-Id: I0b1d996d206327fd1b51ac6e82d548829bdb1570

tests/rdc_tests/CMakeLists.txt

@@ -86,9 +86,9 @@ target_link_libraries(${RDCTST}
     PUBLIC pthread)
 
 install(TARGETS ${RDCTST}
-    DESTINATION ${RDC_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR}/rdctst_tests
+    DESTINATION ${RDC_SHARE_INSTALL_PREFIX}/rdctst_tests
     COMPONENT ${TESTS_COMPONENT})
 
 install(FILES ${RDCTST}.exclude
-    DESTINATION ${RDC_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR}/rdctst_tests
+    DESTINATION ${RDC_SHARE_INSTALL_PREFIX}/rdctst_tests
     COMPONENT ${TESTS_COMPONENT})