[cmake][Win][Ninja] Fix Ninja build on Windows

On Windows, with Ninja, there is no `$<CONFIG>` subdirectory

Author: bellenot

roottest/root/io/bigevent/CMakeLists.txt

@@ -7,7 +7,7 @@ ROOT_LINKER_LIBRARY(IoBigEventGeneration
   G__IoBigEventGeneration.cxx
   LIBRARIES Core Tree Hist MathCore Physics Graf Matrix)
 
-if(MSVC)
+if(MSVC AND NOT CMAKE_GENERATOR MATCHES Ninja)
   add_custom_command(TARGET IoBigEventGeneration POST_BUILD
     COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_BINARY_DIR}/$<CONFIG>/libIoBigEventGeneration.dll
                                      ${CMAKE_CURRENT_BINARY_DIR}/libIoBigEventGeneration.dll

roottest/root/treeformula/references/CMakeLists.txt

@@ -7,7 +7,7 @@ ROOT_LINKER_LIBRARY(TreeFormulaReferencesGeneration
   G__TreeFormulaReferencesGeneration.cxx
   LIBRARIES Core Tree Hist MathCore)
 
-if(MSVC)
+if(MSVC AND NOT CMAKE_GENERATOR MATCHES Ninja)
   add_custom_command(TARGET TreeFormulaReferencesGeneration POST_BUILD
     COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_BINARY_DIR}/$<CONFIG>/libTreeFormulaReferencesGeneration.dll
                                      ${CMAKE_CURRENT_BINARY_DIR}/libTreeFormulaReferencesGeneration.dll

tree/ntuple/test/CMakeLists.txt

@@ -117,7 +117,7 @@ target_compile_options(StreamerFieldXMLDict PRIVATE $<TARGET_PROPERTY:rfield_str
 target_compile_definitions(StreamerFieldXMLDict PRIVATE $<TARGET_PROPERTY:rfield_streamer,COMPILE_DEFINITIONS>)
 target_compile_features(StreamerFieldXMLDict PRIVATE $<TARGET_PROPERTY:rfield_streamer,COMPILE_FEATURES>)
 target_include_directories(StreamerFieldXMLDict PRIVATE $<TARGET_PROPERTY:rfield_streamer,INCLUDE_DIRECTORIES>)
-if(MSVC)
+if(MSVC AND NOT CMAKE_GENERATOR MATCHES Ninja)
   add_custom_command(TARGET rfield_streamer POST_BUILD
     COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_BINARY_DIR}/librfield_streamer_rdict.pcm
                              ${CMAKE_CURRENT_BINARY_DIR}/$<CONFIG>/librfield_streamer_rdict.pcm