* strdup is returning a malloced string that needs to freed after use

> Direct leak of 90 byte(s) in 1 object(s) allocated from:
    >0 0x7ffff745b9a7 in __interceptor_strdup ../../../../src/libsanitizer/asan/asan_interceptors.cpp:454
    >1 0x555556c7b341 in main /executables/nr-uesoftmodem.c:461
    >2 0x7ffff5e29d8f in __libc_start_call_main ../sysdeps/nptl/libc_start_call_main.h:58