utils12: Add extern to tssUtilsVerbose for Debian #27

Job	Run time
job (debian:stable, gcc, i386, i386)	55s
job (debian:stable, ppc64el, powerpc64le-linux-gnu-gcc, cross-compile)	58s
job (debian:stable, arm64, aarch64-linux-gnu-gcc, cross-compile)	57s
job (debian:stable, s390x, s390x-linux-gnu-gcc, cross-compile)	55s
job (alpine:latest, gcc)	6m 26s
job (opensuse/tumbleweed, clang)	7m 42s
job (opensuse/leap, gcc)	7m 56s
job (ubuntu:jammy, gcc)	7m 10s
job (fedora:latest, clang)	9m 5s
job (debian:testing, clang)	7m 15s
job (debian:stable, clang)	7m 25s
job (alt:sisyphus, gcc)	7m 35s
	1h 4m 19s

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