snort3: fix logic in gpertools-runtime depends

snort3: fix logic in gpertools-runtime depends

The logic in e57cc9898a362d81e8dec5dd779293e6ff3d4710 was flawed causing
gperftools-runtime to fail to get detected when building resulting in:
...
ninja: Entering directory `/scratch/union/build_dir/target-x86_64_glibc/snort3-3.9.1.0'
ninja: error: '/scratch/union/staging_dir/target-x86_64_glibc/usr/lib/libtcmalloc.so', needed by 'src/snort', missing and no known rule to make it
make[2]: *** [Makefile:161: /scratch/union/build_dir/target-x86_64_glibc/snort3-3.9.1.0/.built] Error 1

It was missed due testing in build root that already had gperftools-runtime
built only discovered when building from a clean build root.

This commit fixes this flaw.

Test:
cat <<EOF > .config
CONFIG_TARGET_x86=y
CONFIG_TARGET_x86_64=y
CONFIG_TARGET_x86_64_DEVICE_generic=y
CONFIG_PACKAGE_snort3=y
EOF

make defconfig
grep gperftools-run .config
CONFIG_PACKAGE_gperftools-runtime=y

cat <<EOF > .config
CONFIG_TARGET_qoriq=y
CONFIG_TARGET_qoriq_generic=y
CONFIG_TARGET_qoriq_generic_DEVICE_watchguard_firebox-m300=y
CONFIG_PACKAGE_snort3=y
EOF

make defconfig
grep gperftools-run .config

Signed-off-by: John Audia <[email protected]>