downloads: upgrade zlib 1.2.12 -> 1.2.13

This required adding `--static` to `configure` because of changes to
configure respecting CC. This caused symbol visibility issues, which
prevented a shared library from linking. We don't use the shared
library. So it should be safe to just not build it.

Author: indygreg

cpython-unix/build-zlib.sh

@@ -13,6 +13,8 @@ tar -xf zlib-${ZLIB_VERSION}.tar.gz
 
 pushd zlib-${ZLIB_VERSION}
 
-CFLAGS="${EXTRA_TARGET_CFLAGS} -fPIC" LDFLAGS="${EXTRA_TARGET_LDFLAGS}" ./configure --prefix=/tools/deps
+CFLAGS="${EXTRA_TARGET_CFLAGS} -fPIC" LDFLAGS="${EXTRA_TARGET_LDFLAGS}" ./configure \
+  --prefix=/tools/deps \
+  --static
 make -j ${NUM_CPUS}
 make -j ${NUM_CPUS} install DESTDIR=${ROOT}/out

pythonbuild/downloads.py

@@ -330,10 +330,10 @@
         "license_public_domain": True,
     },
     "zlib": {
-        "url": "https://zlib.net/fossils/zlib-1.2.12.tar.gz",
-        "size": 1490071,
-        "sha256": "91844808532e5ce316b3c010929493c0244f3d37593afd6de04f71821d5136d9",
-        "version": "1.2.12",
+        "url": "https://zlib.net/fossils/zlib-1.2.13.tar.gz",
+        "size": 1497445,
+        "sha256": "b3a24de97a8fdbc835b9833169501030b8977031bcb54b3b3ac13740f846ab30",
+        "version": "1.2.13",
         "library_names": ["z"],
         "licenses": ["Zlib"],
         "license_file": "LICENSE.zlib.txt",