tests/init.sh: fix comment
tests/init.sh: fix comment

* tests/init.sh (match_awk): Fix usage description.

Saruta/strace,kapdop/android_external_strace,vrastogi/strace,cuviper/strace,kapdop/android_external_strace,cuviper/strace,Saruta/strace,Distrotech/strace,kapdop/android_external_strace,vrastogi/strace,cuviper/strace,Saruta/strace,Saruta/strace,Distrotech/strace,cuviper/strace,kapdop/android_external_strace,Saruta/strace,cuviper/strace,vrastogi/strace,kapdop/android_external_strace,vrastogi/strace,Distrotech/strace,Distrotech/strace,vrastogi/strace,Distrotech/strace