Ignore GCC warnings in FVTR
Ignore GCC warnings in FVTR

Stop treating warnings from GCC as errors in the FVTR.
We only care about real errors, i.e. exit code != 0.

Signed-off-by: Tulio Magno Quites Machado Filho <0e1b3d0765ee75ed64fa2e34822e4949a70a1429@linux.ibm.com>

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