Fix the redeclaration against GLES2 and GLES3.

The following shows the error. ``` cuda-samples/Samples/8_Platform_Specific/Tegra/simpleGLES_EGLOutput$ cmake . -- The C compiler identification is GNU 13.3.0 -- The CXX compiler identification is GNU 13.3.0 -- The CUDA compiler identification is NVIDIA 12.8.93 -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Check for working C compiler: /usr/bin/cc - skipped -- Detecting C compile features -- Detecting C compile features - done -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Check for working CXX compiler: /usr/bin/c++ - skipped -- Detecting CXX compile features -- Detecting CXX compile features - done -- Detecting CUDA compiler ABI info -- Detecting CUDA compiler ABI info - done -- Check for working CUDA compiler: /usr/local/cuda-12.8/bin/nvcc - skipped -- Detecting CUDA compile features -- Detecting CUDA compile features - done -- Found CUDAToolkit: /usr/local/cuda-12.8/targets/x86_64-linux/include (found version "12.8.93") -- Performing Test CMAKE_HAVE_LIBC_PTHREAD -- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Success -- Found Threads: TRUE -- Found EGL: /usr/lib/x86_64-linux-gnu/libEGL.so -- Found X11: /usr/include -- Looking for XOpenDisplay in /usr/lib/x86_64-linux-gnu/libX11.so -- Looking for XOpenDisplay in /usr/lib/x86_64-linux-gnu/libX11.so - found -- Looking for gethostbyname -- Looking for gethostbyname - found -- Looking for connect -- Looking for connect - found -- Looking for remove -- Looking for remove - found -- Looking for shmat -- Looking for shmat - found -- Found OpenGL: /usr/lib/x86_64-linux-gnu/libOpenGL.so -- Configuring done (4.8s) -- Generating done (0.0s) -- Build files have been written to: /home/sylee/side/cuda-samples/Samples/8_Platform_Specific/Tegra/simpleGLES_EGLOutput cuda-samples/Samples/8_Platform_Specific/Tegra/simpleGLES_EGLOutput$ make [ 33%] Building CUDA object CMakeFiles/simpleGLES_EGLOutput.dir/simpleGLES_EGLOutput.cu.o /home/sylee/side/cuda-samples/Samples/8_Platform_Specific/Tegra/simpleGLES_EGLOutput/graphics_interface_egloutput_via_egl.c(131): warning #68-D: integer conversion resulted in a change of sign uint32_t fb_id = -1; ^ Remark: The warnings can be suppressed with "-diag-suppress <warning-number>" /home/sylee/side/cuda-samples/Samples/8_Platform_Specific/Tegra/simpleGLES_EGLOutput/../../../../Common/GL/glext.h(3821): error: invalid redeclaration of type name "PFNGLSHADERSOURCEPROC" (declared at line 462 of /usr/include/GLES3/gl31.h) typedef void ( * PFNGLSHADERSOURCEPROC)(GLuint shader, GLsizei count, const GLchar **string, const GLint *length); ^ 1 error detected in the compilation of "/home/sylee/side/cuda-samples/Samples/8_Platform_Specific/Tegra/simpleGLES_EGLOutput/simpleGLES_EGLOutput.cu". make[2]: *** [CMakeFiles/simpleGLES_EGLOutput.dir/build.make:77: CMakeFiles/simpleGLES_EGLOutput.dir/simpleGLES_EGLOutput.cu.o] Error 2 make[1]: *** [CMakeFiles/Makefile2:83: CMakeFiles/simpleGLES_EGLOutput.dir/all] Error 2 make: *** [Makefile:91: all] Error 2 ```