Ensure prototypes don't have empty parameter lists
Ensure prototypes don't have empty parameter lists

When built in environments with warnings enable, newer versions of
GCC complain about two of the function definitions not being prototypes. This
is solved by using (void) instead of ()

fuchsia-mirror/third_party-shaderc,antiagainst/shaderc,antiagainst/shaderc,antiagainst/shaderc,AWoloszyn/shaderc,Qining/shaderc,dneto0/shaderc,dneto0/shaderc,dneto0/shaderc,Qining/shaderc,AWoloszyn/shaderc,Qining/shaderc,antiagainst/shaderc,fuchsia-mirror/third_party-shaderc,dneto0/shaderc,fuchsia-mirror/third_party-shaderc,AWoloszyn/shaderc