fix Doxyfile

swilib/Doxyfile

@@ -290,8 +290,8 @@ TAB_SIZE               = 4
 # @} or use a double escape (\\{ and \\})
 
 ALIASES                += "unnamed{1}=\internal :unnamed(\1) \endinternal"
-ALIASES                += "builtin="
-ALIASES                += "platforms="
+ALIASES                += "builtin=\par Builtin on platforms:^^"
+ALIASES                += "platforms=\par Available on platforms:^^"
 
 # Set the OPTIMIZE_OUTPUT_FOR_C tag to YES if your project consists of C sources
 # only. Doxygen will then generate output that is more tailored for C. For