Adding qtc_enable_sanitize to add_qtc_executable to also instrument applications
Changing qtc_enable_sanitize to use target_compile_options instead of trying
to modify CMAKE_CXX_FLAGS_DEBUG and hoping that nobody else overwrites it,
which previously erased the added flags.
Adds support for MSVC /fsanitize
Change-Id: Ida80cfd7ef7ea91b2d6473fdc047cb7132cdfec6
Reviewed-by: Cristian Adam <cristian.adam@qt.io>