!450 Android doesn't need -lrt.

From: @zhao_zhixuan
Reviewed-by: @xchu42,@ji_chen
Signed-off-by: @ji_chen

ge/common/CMakeLists.txt

@@ -115,7 +115,7 @@ target_link_libraries(ge_common PRIVATE
     slog
     -Wl,--as-needed
     json
-    -lrt
+    $<$<NOT:$<STREQUAL:${TARGET_SYSTEM_NAME},Android>>:-lrt>
     -ldl
 )