Change PADDLE_ONLY_CPU to PADDLE_WITH_GPU

[reyoung]

Fixes #4588

By shell command

sed -i 's#ifdef PADDLE_ONLY_CPU#ifndef PADDLE_WITH_GPU#g' `find ./paddle/ -name '*.h' -o -name '*.cc' -o -name '*.cpp' -o -name '*.c'`
sed -i 's#ifndef PADDLE_ONLY_CPU#ifdef PADDLE_WITH_GPU#g' `find ./paddle/ -name '*.h' -o -name '*.cc' -o -name '*.cpp' -o -name '*.c'`

[wangkuiyi]

Thanks for this PR! @reyoung

I am afraid that this sed trick has not fixed all uses of PADDLE_ONLY_CPU, because when I search for PADDLE_ONLY_CPU on Github:

https://github.com/PaddlePaddle/Paddle/search?utf8=%E2%9C%93&q=PADDLE_ONLY_CPU&type=

I see 82 C++ files, 2 CUDA files, and 1 C files, which sum up to 85 source files.

However, this PR changes 84 files in total, including the configure.cmake file.

[wangkuiyi]

I see. @reyoung you might forgot to update the two .cu files:

https://github.com/PaddlePaddle/Paddle/search?l=Cuda&q=PADDLE_ONLY_CPU&type=&utf8=%E2%9C%93

In above command line,

-name '*.h' -o -name '*.cc' -o -name '*.cpp' -o -name '*.c'

we need to add

-name '*.h' -o -name '*.cc' -o -name '*.cpp' -o -name '*.c' -name '*.cu'

[reyoung]

we need to add '*.cu'

Yes. I will add that soon.