tests: work around pdwtags 1.9 failure
tests: work around pdwtags 1.9 failure

On rawhide, gcc is new enough to output new DWARF information that
pdwtags has not yet learned, but the resulting 'make check' output
was rather confusing:

$ make -C src check
...
  GEN    virkeepaliveprotocol-structs
die__process_function: DW_TAG_INVALID (0x4109) @ <0x58c> not handled!
WARNING: your pdwtags program is too old
WARNING: skipping the virkeepaliveprotocol-structs test
WARNING: install dwarves-1.3 or newer
...
$ pdwtags --version
v1.9

I've filed the pdwtags deficiency as
https://bugzilla.redhat.com/show_bug.cgi?id=772358

* src/Makefile.am (PDWTAGS): Don't leave -t file behind on version
mismatch.  Soften warning message, since 1.9 is newer than 1.3.
Don't leak stderr from broken version.

iam-TJ/libvirt,jeckersb/libvirt,zhlcindy/libvirt-1.1.4-maintain,jfehlig/libvirt,nertpinx/libvirt,iam-TJ/libvirt,rlaager/libvirt,cbosdo/libvirt,eskultety/libvirt,dumbbell/libvirt,zippy2/libvirt,danwent/libvirt-ovs,fabianfreyer/libvirt,foomango/libvirt,siboulet/libvirt-openvz,danwent/libvirt-ovs,emaste/libvirt,jfehlig/libvirt,jeckersb/libvirt,zippy2/libvirt,agx/libvirt,iam-TJ/libvirt,wiedi/libvirt,cbosdo/libvirt,danwent/libvirt-ovs,cbosdo/libvirt,olafhering/libvirt,datto/libvirt,jardasgit/libvirt,eskultety/libvirt,warewolf/libvirt,datto/libvirt,wiedi/libvirt,warewolf/libvirt,agx/libvirt,crobinso/libvirt,iam-TJ/libvirt,taget/libvirt,rmarwaha/libvirt1,rlaager/libvirt,taget/libvirt,rmarwaha/libvirt1,jfehlig/libvirt,zhlcindy/libvirt-1.1.4-maintain,nertpinx/libvirt,bjzhang/libvirt,danwent/libvirt-ovs,nertpinx/libvirt,fabianfreyer/libvirt,danwent/libvirt-ovs,crobinso/libvirt,trainstack/libvirt,bjzhang/libvirt,libvirt/libvirt,jardasgit/libvirt,emaste/libvirt,VenkatDatta/libvirt,novel/fbsd-libvirt,foomango/libvirt,crobinso/libvirt,emaste/libvirt,rlaager/libvirt,taget/libvirt,jardasgit/libvirt,novel/fbsd-libvirt,dumbbell/libvirt,datto/libvirt,shugaoye/libvirt,eskultety/libvirt,bjzhang/libvirt,jardasgit/libvirt,rlaager/libvirt,shugaoye/libvirt,agx/libvirt,trainstack/libvirt,elmarco/libvirt,jeckersb/libvirt,fabianfreyer/libvirt,libvirt/libvirt,eskultety/libvirt,libvirt/libvirt,datto/libvirt,jeckersb/libvirt,nertpinx/libvirt,siboulet/libvirt-openvz,rmarwaha/libvirt,emaste/libvirt,iam-TJ/libvirt,taget/libvirt,olafhering/libvirt,foomango/libvirt,agx/libvirt,VenkatDatta/libvirt,iam-TJ/libvirt,elmarco/libvirt,wiedi/libvirt,warewolf/libvirt,iam-TJ/libvirt,VenkatDatta/libvirt,VenkatDatta/libvirt,zhlcindy/libvirt-1.1.4-maintain,emaste/libvirt,rmarwaha/libvirt,rmarwaha/libvirt1,shugaoye/libvirt,cbosdo/libvirt,novel/fbsd-libvirt,warewolf/libvirt,novel/fbsd-libvirt,warewolf/libvirt,elmarco/libvirt,andreabolognani/libvirt,olafhering/libvirt,olafhering/libvirt,zhlcindy/libvirt-1.1.4-maintain,novel/fbsd-libvirt,novel/fbsd-libvirt,warewolf/libvirt,rmarwaha/libvirt,jardasgit/libvirt,cbosdo/libvirt,foomango/libvirt,rmarwaha/libvirt1,novel/fbsd-libvirt,shugaoye/libvirt,dumbbell/libvirt,agx/libvirt,rmarwaha/libvirt,crobinso/libvirt,emaste/libvirt,datto/libvirt,wiedi/libvirt,jeckersb/libvirt,eskultety/libvirt,wiedi/libvirt,rmarwaha/libvirt,zhlcindy/libvirt-1.1.4-maintain,trainstack/libvirt,bjzhang/libvirt,taget/libvirt,foomango/libvirt,trainstack/libvirt,rmarwaha/libvirt1,trainstack/libvirt,jeckersb/libvirt,andreabolognani/libvirt,siboulet/libvirt-openvz,rlaager/libvirt,trainstack/libvirt,elmarco/libvirt,nertpinx/libvirt,rmarwaha/libvirt1,emaste/libvirt,andreabolognani/libvirt,siboulet/libvirt-openvz,warewolf/libvirt,wiedi/libvirt,zippy2/libvirt,elmarco/libvirt,andreabolognani/libvirt,dumbbell/libvirt,andreabolognani/libvirt,zippy2/libvirt,novel/fbsd-libvirt,VenkatDatta/libvirt,siboulet/libvirt-openvz,fabianfreyer/libvirt,libvirt/libvirt,trainstack/libvirt,jeckersb/libvirt,fabianfreyer/libvirt,novel/fbsd-libvirt,wiedi/libvirt,shugaoye/libvirt,jfehlig/libvirt,dumbbell/libvirt,rmarwaha/libvirt,dumbbell/libvirt,bjzhang/libvirt