AVRO-4167: [C++] Fix install locations (#3434)

Use standard CMake variables for the locations, which can vary depending
on platform. (e.g. lib64 instead of lib) Use bin rather than lib
directory for runtime, which is expected for Windows DLLs.

Author: here-abarany

lang/c++/CMakeLists.txt

@@ -141,7 +141,7 @@ target_compile_definitions(avrocpp_s PRIVATE AVRO_SOURCE)
 set_target_properties (avrocpp PROPERTIES VERSION ${AVRO_VERSION})
 set_target_properties (avrocpp_s PROPERTIES VERSION ${AVRO_VERSION})
 
-target_link_libraries(avrocpp PUBLIC 
+target_link_libraries(avrocpp PUBLIC
   $<BUILD_INTERFACE:fmt::fmt-header-only>
   $<BUILD_INTERFACE:ZLIB::ZLIB>
   $<BUILD_INTERFACE:$<TARGET_NAME_IF_EXISTS:Snappy::snappy>>
@@ -258,13 +258,13 @@ include (CPack)
 
 install (TARGETS avrocpp avrocpp_s
     EXPORT avrocpp_targets
-    LIBRARY DESTINATION lib
-    ARCHIVE DESTINATION lib
-    RUNTIME DESTINATION lib
+    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
     INCLUDES DESTINATION include)
 
 if (AVRO_BUILD_EXECUTABLES)
-    install (TARGETS avrogencpp EXPORT avrocpp_targets RUNTIME DESTINATION bin)
+    install (TARGETS avrogencpp EXPORT avrocpp_targets RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
 endif ()
 
 install (DIRECTORY include/avro DESTINATION include