[testsuite] Don't XFAIL gfortran.dg/do_1.f90 (PR fortran/54932)

[Rainer Orth]

As discussed in PR fortran/54932, the gfortran.dg/do_1.f90 execution
tests recently stated to XPASS at all optimization levels, adding lots
of testsuite noise.  The following patch removes the xfail, allowing all
tests to pass.

Tested with the appropriate runtest invocations on
x86_64-unknown-linux-gnu, i386-pc-solaris2.11, and
sparc-sun-solaris2.11.  Ok for mainline and 4.8 branch?

Thanks.
	Rainer


2013-03-19  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	PR fortran/54932
	* gfortran.dg/do_1.f90: Don't xfail.

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Rainer Orth, Center for Biotechnology, Bielefeld University