[Pharo-dev] [update 3.0] #30152

[Esteban Lorenzano]

30152
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10478 Add Symbol >> #asClass
        https://pharo.fogbugz.com/f/cases/10478
        
10705 Safer NativeBoost usage
        https://pharo.fogbugz.com/f/cases/10705

Diff information:
http://smalltalkhub.com/mc/Pharo/Pharo30/main/System-Support-EstebanLorenzano.839.diff
http://smalltalkhub.com/mc/Pharo/Pharo30/main/Morphic-Base-EstebanLorenzano.1.diff
http://smalltalkhub.com/mc/Pharo/Pharo30/main/FileSystem-Core-EstebanLorenzano.83.diff