graphene-bench-utils.h: Export Symbols Via Compiler Attributes
graphene-bench-utils.h: Export Symbols Via Compiler Attributes

Decorate the symbols in the headers so that the symbols can be exported, as
graphene-bench-utils.c needs to be built as a DLL.

ebassi/graphene,criptych/graphene,criptych/graphene,criptych/graphene,ebassi/graphene,criptych/graphene