Fix extension/data_loader installation (#3355)

Summary:
`libextension_data_loader.a` is not installed properly. This PR removes the prefix so that it can be properly installed

Pull Request resolved: #3355

Test Plan: See `libextension_data_loader.a` showing up under executorch/cmake-out/lib.

Reviewed By: lucylq, mikekgfb

Differential Revision: D56580943

Pulled By: larryliu0820

fbshipit-source-id: b771192d03799fd576e8591ec7c45fae23f20762

Author: larryliu0820

extension/data_loader/CMakeLists.txt

@@ -25,6 +25,6 @@ target_compile_options(extension_data_loader PUBLIC ${_common_compile_options})
 # Install libraries
 install(
   TARGETS extension_data_loader
-  DESTINATION ${CMAKE_BINARY_DIR}/lib
+  DESTINATION lib
   INCLUDES
   DESTINATION ${_common_include_directories})