hdlmake_nonproj

the original hdlmake writes lines like
```
echo set_property "KEY" "VALUE" ...
```
to the Makefile.
Make will remove the quotes around `KEY` and `VALUE`, thus the generated tcl file will only contain
```
set_property KEY VALUE ...
```

Since we use single quotes around the corresponding line to preserve the leading blanks, the double quotes have to be removed
otherwise option values which contain blanks (e.g.
```
  [ "xpm_libraries", "{XPM_CDC XPM_FIFO XPM_MEMORY}" ],
```
)
have to be treated differently in project and non-project workflows.