[offload][asan][cuda] force remove -O3 from cuda rtl.cpp (llvm#1504)

Author: ronlieb

offload/plugins-nextgen/cuda/CMakeLists.txt

@@ -2,6 +2,8 @@
 add_target_library(omptarget.rtl.cuda CUDA)
 
 target_sources(omptarget.rtl.cuda PRIVATE src/rtl.cpp)
+#workaround strange -O3 issue for cuda src.rtk,coo ASAN
+set_source_files_properties(src/rtl.cpp PROPERTIES COMPILE_FLAGS "-O0")
 
 find_package(CUDAToolkit QUIET)
 if(CUDAToolkit_FOUND AND NOT "cuda" IN_LIST LIBOMPTARGET_DLOPEN_PLUGINS)