Skip install_source on windows

Author: ddelange

add_libmagic.sh

@@ -3,6 +3,8 @@
 set -euxo pipefail
 
 install_source() {
+    # skip on Windows for now
+    python -c 'import platform; assert platform.system() != "Windows"' || exit 1
     # install from source
     # https://www.darwinsys.com/file/
     # https://github.com/file/file/blob/FILE5_46/INSTALL#L51