[vta] stabilize label numbers with CFA on IA64

[Alexandre Oliva]

IA64 emits deleted labels in the process of preparing to output CFAs.
This causes (harmless AFAICT) differences detected by -fcompare-debug.
It doesn't hurt too much to emit the deleted labels even when not
emitting frame information, and it can save us headaches if the
differences aren't harmless after all.  Fixed as follows.

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-- 
Alexandre Oliva         http://www.lsd.ic.unicamp.br/~oliva/
Free Software Evangelist  oliva@{lsd.ic.unicamp.br, gnu.org}
FSFLA Board Member       ?S? Libre! => http://www.fsfla.org/
Red Hat Compiler Engineer   aoliva@{redhat.com, gcc.gnu.org}