swift234

SILParser: handle overloaded members in SILDeclRef.

The problem is that SILDeclRef::print does not print enough information
for SILParser to find the correct Decl when there are overloading members.

This commit handles the case for class_method. We print type information for
the SILDeclRef together with the SILFunctionType separated by a comma.

SILParser then use the type information to disambiguate the overloaded
methods.

rdar://15763213


Swift SVN r14994