[OpenMP] Fix intermediate header locations for OpenMP

Summary:
A previous patch moved the code here and accidentally overrwrote the
include path that the LSP interface used. This caused incorrect errors
when using clangd with the offload project. This patch removes the
unnecessary header and makes sure we include the correct folder.

Author: jhuber6

openmp/runtime/src/CMakeLists.txt

@@ -20,7 +20,7 @@ endif()
 # Configure omp.h, kmp_config.h and omp-tools.h if necessary
 configure_file(${LIBOMP_INC_DIR}/omp.h.var ${LIBOMP_HEADERS_INTDIR}/omp.h @ONLY)
 configure_file(${LIBOMP_INC_DIR}/ompx.h.var ${LIBOMP_HEADERS_INTDIR}/ompx.h @ONLY)
-configure_file(kmp_config.h.cmake ${LIBOMP_HEADERS_INTDIR}/kmp_config.h @ONLY)
+configure_file(kmp_config.h.cmake kmp_config.h @ONLY)
 if(${LIBOMP_OMPT_SUPPORT})
   configure_file(${LIBOMP_INC_DIR}/omp-tools.h.var ${LIBOMP_HEADERS_INTDIR}/omp-tools.h @ONLY)
 endif()
@@ -55,7 +55,6 @@ include_directories(
   ${LIBOMP_SRC_DIR}/i18n
   ${LIBOMP_INC_DIR}
   ${LIBOMP_SRC_DIR}/thirdparty/ittnotify
-  ${LIBOMP_HEADERS_INTDIR}
 )
 
 # Building with time profiling support requires LLVM directory includes.
@@ -441,7 +440,7 @@ if(${LIBOMP_OMPT_SUPPORT})
   install(FILES ${LIBOMP_HEADERS_INTDIR}/omp-tools.h DESTINATION ${LIBOMP_HEADERS_INSTALL_PATH})
   # install under legacy name ompt.h
   install(FILES ${LIBOMP_HEADERS_INTDIR}/omp-tools.h DESTINATION ${LIBOMP_HEADERS_INSTALL_PATH} RENAME ompt.h)
-  set(LIBOMP_OMP_TOOLS_INCLUDE_DIR ${LIBOMP_HEADERS_INTDIR} PARENT_SCOPE)
+  set(LIBOMP_OMP_TOOLS_INCLUDE_DIR ${CMAKE_CURRENT_BINARY_DIR} PARENT_SCOPE)
 endif()
 if(${BUILD_FORTRAN_MODULES})
   set (destination ${LIBOMP_HEADERS_INSTALL_PATH})