[mythtv] debug builds for non macx ppc and -maltivec

[Nigel Pearson]

>   macx {
>     QMAKE_CFLAGS_RELEASE += -faltivec
>     QMAKE_CFLAGS_DEBUG   += -faltivec
>   }
>   !macx {
>     QMAKE_CFLAGS_RELEASE += -maltivec -mabi=altivec
>   }
>
> Is there a QMAKE_CFLAGS_DEBUG += -maltivec -mabi=altivec missing in
> the !macx section?

It should be safe to add that,
but settings.pro has this:

QMAKE_CXXFLAGS += $$ARCHFLAGS
QMAKE_CFLAGS   += $$ARCHFLAGS

which should already include
the appropriate AltiVec flags.

I am doing some tests now.

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