zlib: renamed and split files dir

files had patches for 1.2.3 and 1.2.5 but these were fully
disjucnt so put them into two separate dirs

Signed-off-by: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>

diff --git a/recipes/zlib/files/autotools.patch b/recipes/zlib/zlib-1.2.3/autotools.patch
similarity index 100%
rename from recipes/zlib/files/autotools.patch
rename to recipes/zlib/zlib-1.2.3/autotools.patch

diff --git a/recipes/zlib/files/visibility.patch b/recipes/zlib/zlib-1.2.3/visibility.patch
similarity index 100%
rename from recipes/zlib/files/visibility.patch
rename to recipes/zlib/zlib-1.2.3/visibility.patch

diff --git a/recipes/zlib/files/0001-autotools.patch b/recipes/zlib/zlib-1.2.5/0001-autotools.patch
similarity index 100%
rename from recipes/zlib/files/0001-autotools.patch
rename to recipes/zlib/zlib-1.2.5/0001-autotools.patch