Improved title o) How to avoid Quartus exit due to IP that is included at...

Improved title o) How to avoid Quartus exit due to IP that is included at configuration, but not used at synthesis.

tools/hdltool_readme.txt

@@ -695,7 +695,7 @@ m) (FIXED) Issue exit error when a library name occurs double
    
 n) Rename modelsim_compile_ip_files into more precise name eg. modelsim_execute or modelsim_pre_execute
 
-o) Conditional include of IP libraries to avoid Quartus exit due to missing IP signals
+o) How to avoid Quartus exit due to IP that is included at configuration, but not used at synthesis
    Quartus can exit with error if IP is included in the hdl_lib_uses list of libraries but not actually used in
    the design, eg due to a sdc file that is then sourced but that cannot find some IP signals.
    If the error is changed into warning then Quartus continues. Such modification of the sdc file could be automated