Build error with Linux audit

[rainer]

sh_audit.o: In function `add_this':
x_sh_audit.c:(.text+0x80e): undefined reference to `sh_utils_strdup'
sh_audit.o: In function `sh_audit_mark':
x_sh_audit.c:(.text+0x9bc): undefined reference to `sh_utils_strdup'
collect2: ld returned 1 exit status
make: *** [samhain] Error 1

Reported by Andy Jack

[rainer]

Believed to be fixed by changeset [419].