zlib: Add patch for CMake builds
zlib: Add patch for CMake builds

This adds a simple patch for the ZLib CMake files so that we can get
zlib1.lib and zlib1.pdb when we use BUILD_SHARED_LIBS, so that it will
match what is going on in the win32/makefile.msc better.

fanc999/gtk-msvc-projects,fanc999/gtk-msvc-projects,fanc999/gtk-msvc-projects,fanc999/gtk-msvc-projects,fanc999/gtk-msvc-projects