Add post-install script to SDK bundle

Author: marcprux

swift-ci/sdks/android/scripts/build.sh

@@ -444,7 +444,6 @@ EOF
 mkdir -p $swift_res_root/usr/lib/swift/clang/lib
 cp -r $host_toolchain/lib/clang/*/include $swift_res_root/usr/lib/swift/clang
 
-
 for arch in $archs; do
     quiet_pushd ${sdk_staging}/${arch}/usr
         rm -r bin