[Libomptarget][Obvious] Fix incorrect if-else in CMake for destination

Summary:
This was added in a previous patch to update how we export the static
library used for OpenMP offloading. By mistake this if-else was using
the output incorrectly.

Fixes #74079

Author: jhuber6

openmp/libomptarget/CMakeLists.txt

@@ -24,7 +24,7 @@ set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${LIBOMPTARGET_LIBRARY_DIR})
 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${LIBOMPTARGET_LIBRARY_DIR})
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${LIBOMPTARGET_LIBRARY_DIR})
 
-if(LLVM_LIBRARY_OUTPUT_INTDIR)
+if(NOT LLVM_LIBRARY_OUTPUT_INTDIR)
   set(LIBOMPTARGET_INTDIR ${LIBOMPTARGET_LIBRARY_DIR})
 else()
   set(LIBOMPTARGET_INTDIR ${LLVM_LIBRARY_OUTPUT_INTDIR})

openmp/libomptarget/DeviceRTL/CMakeLists.txt

@@ -302,7 +302,7 @@ endforeach()
 # Archive all the object files generated above into a static library
 add_library(omptarget.devicertl STATIC)
 set_target_properties(omptarget.devicertl PROPERTIES
-  ARCHIVE_OUTPUT_DIRECTORY ${LIBOMPTARGET_LLVM_LIBRARY_INTDIR}
+  ARCHIVE_OUTPUT_DIRECTORY "${LIBOMPTARGET_LLVM_LIBRARY_INTDIR}"
   LINKER_LANGUAGE CXX
 )
 target_link_libraries(omptarget.devicertl PRIVATE omptarget.devicertl.all_objs)