Unify FOLDER property of Polly targets

Put all Polly targets into a single "Polly" category (i.e.
solution folder). Previously there was no recognizable scheme and most
categories contained just one or two targets or targets didn't belong
to any category.

Reviewers: grosser
llvm-svn: 242779
diff --git a/polly/CMakeLists.txt b/polly/CMakeLists.txt
index 453acd4..078090b 100644
--- a/polly/CMakeLists.txt
+++ b/polly/CMakeLists.txt
@@ -162,10 +162,12 @@
   CLANG_FORMAT=${LLVM_BINARY_DIR}/bin/clang-format
   ${CMAKE_CURRENT_SOURCE_DIR}/utils/check_format.sh ${files})
 add_custom_target(polly-check-format DEPENDS formatting)
+set_target_properties(polly-check-format PROPERTIES FOLDER "Polly")
 add_custom_command( OUTPUT formatting-update COMMAND
   CLANG_FORMAT=${LLVM_BINARY_DIR}/bin/clang-format
   ${CMAKE_CURRENT_SOURCE_DIR}/utils/update_format.sh ${files})
 add_custom_target(polly-update-format DEPENDS formatting-update)
+set_target_properties(polly-update-format PROPERTIES FOLDER "Polly")
 
 # Set the variable POLLY_LINK_LIBS in the llvm/tools/ dir.
 set(POLLY_LINK_LIBS ${POLLY_LINK_LIBS} PARENT_SCOPE)