cmSourceFile: Set LANGUAGE property for source files added with target_sources
Includes the change suggested in #19504 (comment 599408).
Fixes: #19504 (closed)
Topic-rename: sf-LANGUAGE-prop
Edited by Brad King
Includes the change suggested in #19504 (comment 599408).
Fixes: #19504 (closed)
Topic-rename: sf-LANGUAGE-prop