egl/main: drop the declaration of PUBLIC keyword.
egl/main: drop the declaration of PUBLIC keyword.

Should no longer be used. As many places indirectly include
eglcompiler.h keep this change separate, so that it can be easily
reverted, if needed.

Signed-off-by: Emil Velikov <4c996f2f093ddd0585a556460b4cc3ba555546ef@gmail.com>
Reviewed-by: Matt Turner <789b315743a28dd066a4ba1459c35951c291d8a6@gmail.com>
Reviewed-by: Brian Paul <3cb4e1df5ec4da2c7c4af7c52cec8cf340a55a10@vmware.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler