Build Environment/macOS/Python: link against zlib statically

rBc70eb30240f8b5d5a8f2ac509f0eb585936142b5 added patch to use static
zlib on Linux. But also added flags to use the zlib in LIBDIR for
Python on macOS. That causes some shared libraries (binascii for one)
to link against libz.1.dylib which will not be there on users' systems.
Reuse the said patch for macOS also to avoid rpath issues.

Fix T85648.
Reviewed By: #platform_macos, brecht
Differential Revision: https://developer.blender.org/D10479

build_files/build_environment/cmake/python.cmake

@@ -77,9 +77,9 @@ else()
   else()
     set(PYTHON_CONFIGURE_ENV ${CONFIGURE_ENV})
     set(PYTHON_BINARY ${BUILD_DIR}/python/src/external_python/python)
-    set(PYTHON_PATCH ${PATCH_CMD} --verbose -p1 -d ${BUILD_DIR}/python/src/external_python < ${PATCH_DIR}/python_linux.diff)
   endif()
-
+  # Link against zlib statically (Unix). Avoid rpath issues (macOS).
+  set(PYTHON_PATCH ${PATCH_CMD} --verbose -p1 -d ${BUILD_DIR}/python/src/external_python < ${PATCH_DIR}/python_unix.diff)
   set(PYTHON_CONFIGURE_EXTRA_ARGS "--with-openssl=${LIBDIR}/ssl")
   set(PYTHON_CFLAGS "-I${LIBDIR}/sqlite/include -I${LIBDIR}/bzip2/include -I${LIBDIR}/lzma/include -I${LIBDIR}/zlib/include")
   set(PYTHON_LDFLAGS "-L${LIBDIR}/ffi/lib -L${LIBDIR}/sqlite/lib -L${LIBDIR}/bzip2/lib -L${LIBDIR}/lzma/lib -L${LIBDIR}/zlib/lib")