STR-301: Check implementation of quoted constructors
STR-301: Check implementation of quoted constructors

In generation of C code in the back-end, check if constructor
is double quoted. If this is the case the call to ATmakeSymbol
should get ATtrue as third argument to indicate that the symbol
is quoted, and the string itself should be unquoted.


svn path=/trunk/StrategoXT/; revision=11935

lichtemo/strategoxt,Apanatshka/strategoxt,metaborg/strategoxt,metaborg/strategoxt,metaborg/strategoxt,Apanatshka/strategoxt,lichtemo/strategoxt,lichtemo/strategoxt,metaborg/strategoxt,Apanatshka/strategoxt,Apanatshka/strategoxt,metaborg/strategoxt,Apanatshka/strategoxt,lichtemo/strategoxt,lichtemo/strategoxt