Fix -G "Unix Makefiles" for linux cmake commnad

[guysoft]

Hey, that line has a typo. it should be -G "Unix Makefiles".

Without this line you get:

$ cmake .. -G Makefile  -DCMAKE_BUILD_TYPE=Release
CMake Error: Could not create named generator Makefile

Generators
* Unix Makefiles               = Generates standard UNIX makefiles.
  Green Hills MULTI            = Generates Green Hills MULTI files
                                 (experimental, work-in-progress).
...

Also

1. it might be a good idea to point that the output is generated at ./samples/bin/linux64/helloworldoverlay I had to search for that too.
2. The -DCMAKE_PREFIX_PATH= is not required in most distr
3. Proff this compiles like this:
   

[okawo80085]

There is a bigger problem with that cmake command, it's making you think you have to use a specific generator to build, that's just plain wrong! Remove the generator argument entirely, there is no generator specific arguments passed so its fine to do that, cmake will choose the default generator installed on the system. It's less confusing that way.

[tort-oise]

Listen to the guy above. I'm pretty sure his fork fixes it.

[okawo80085]

I did, i'm saying it can be better. Literally removing the -G "Unix Makefiles" argument entirely is a better fix.

[guysoft]

I was thinking that too, but thought someone wanted to make it more explicit for some reason, can close and open a new one for that.

[guysoft]

Closing, see #1619

[okawo80085]

That works

[guysoft]

@okawo80085 Feel free to comment there :)

[okawo80085]

Will do!