Due to multiple consecutive whitespaces in our CFLAGS variable,
the gradle function introduced to parse these options failed
and added whitespaces as arguments. This made gcc fail with messages
like
```
gcc: warning: : linker input file unused because linking not done
gcc: error: : linker input file not found: No such file or directory
```
Creds @loqs for finding the root cause of this.
Fixed by replacing multiple consecutive whitespaces within the
parsing code in gradle