feat(cmakev2/utilities): add spaces2list function

The spaces2list function is used by some existing components, so it
should be added to cmakev2 as well.

Signed-off-by: Frantisek Hrbata <frantisek.hrbata@espressif.com>

tools/cmakev2/utilities.cmake

@@ -501,3 +501,21 @@ function(remove_duplicated_flags FLAGS UNIQFLAGS)
     # Return that string to the caller
     set(${UNIQFLAGS} "${FLAGS_LIST}" PARENT_SCOPE)
 endfunction()
+
+#[[
+   spaces2list(<variable>)
+
+   :variable[in,out]: String with space-delimited values.
+
+   Take a variable containing space-delimited values and convert it into a
+   CMake list with semicolon-delimited values.
+
+   Note: do not use this for directories or full paths, as they may contain
+   spaces.
+
+   TODO: look at cmake separate_arguments, which is quote-aware
+#]]
+function(spaces2list variable_name)
+    string(REPLACE " " ";" tmp "${${variable_name}}")
+    set("${variable_name}" "${tmp}" PARENT_SCOPE)
+endfunction()