message: Fix typo
  Panic message should refer to windows-msvc
diff: @@ -157,7 +157,7 @@ fn main() {
  }
  if !found {
  if cfg!(target_env = "msvc") {
  - panic!("windows-gnu requires gdal_i.lib to be present in either $GDAL_LIB_DIR or $GDAL_HOME\\lib.");
  + panic!("windows-msvc requires gdal_i.lib to be present in either $GDAL_LIB_DIR or $GDAL_HOME\\lib.");
  }
  // otherwise, look for a gdalxxx.dll in $GDAL_HOME/bin
  