[libgfortran,patch] Add fallback functions tgamma, lgamma, tgammaf and lgammaf

[FX Coudert]

> Do you mean submit a patch to support those functions in newlib?

That's even better, and probably easy now that I've contributed a C  
implementation to libgfortran.

> Do the testsuite results not constitute a report?

I have no idea what the bug reporting instructions for cygwin or  
newlib are, but I think it's more something like "open a bugzilla PR  
at $URL" than "send a mail to gcc-testresults". And they'd probably  
be more convinced with a concise, C program than a long, Fortran  
testcase, of course.

FX