Add tasks for all the new languages

Task/Sorting-algorithms-Selection-sort/Phix/sorting-algorithms-selection-sort.phix

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+function selection_sort(sequence s)
+integer m
+    for i=1 to length(s) do
+        m = i
+        for j=i+1 to length(s) do
+            if s[j]<s[m] then
+                m = j
+            end if
+        end for
+        {s[i],s[m]} = {s[m],s[i]}
+    end for
+    return s
+end function