Add test for sorting and deduping of file(GLOB) result

Tests/RunCMake/file/GLOB-sort-dedup-stderr.txt

@@ -0,0 +1,2 @@
+content: 7[ ]
+1aAb/\.hide;1aAb/1\.log;1aAb/1\.txt;1aAb/xkcd\.txt;a/1\.log;a/1\.txt;a/boot\.ini

Tests/RunCMake/file/GLOB-sort-dedup.cmake

@@ -0,0 +1,21 @@
+file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/test/a")
+file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/test/1aAb")
+
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/test/a/1.log" "")
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/test/a/1.txt" "")
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/test/a/boot.ini" "")
+
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/test/1aAb/.hide" "")
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/test/1aAb/1.txt" "")
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/test/1aAb/1.log" "")
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/test/1aAb/xkcd.txt" "")
+
+file(GLOB CONTENT_LIST
+  LIST_DIRECTORIES false
+  RELATIVE "${CMAKE_CURRENT_BINARY_DIR}/test"
+  "${CMAKE_CURRENT_BINARY_DIR}/test/a/*"
+  "${CMAKE_CURRENT_BINARY_DIR}/test/*/*"
+  )
+list(LENGTH CONTENT_LIST CONTENT_COUNT)
+message("content: ${CONTENT_COUNT} ")
+message("${CONTENT_LIST}")

Tests/RunCMake/file/RunCMakeTest.cmake

@@ -38,6 +38,7 @@ run_cmake(GLOB_RECURSE)
 run_cmake(GLOB_RECURSE-noexp-FOLLOW_SYMLINKS)
 
 # tests are valid both for GLOB and GLOB_RECURSE
+run_cmake(GLOB-sort-dedup)
 run_cmake(GLOB-error-FOLLOW_SYMLINKS)
 run_cmake(GLOB-error-LIST_DIRECTORIES-not-boolean)
 run_cmake(GLOB-error-LIST_DIRECTORIES-no-arg)