crowdsec: fix compilation with musl 1.2.4

[PolynomialDivision]

_LARGEFILE64_SOURCE has to be defined in the source, or CFLAGS can be used to pass -D_LARGEFILE64_SOURCE to allow to keep using LFS64 definitions.

Fixes errors in the form of:

Building targets
github.com/mattn/go-sqlite3
sqlite3-binding.c:35901:42: error: 'pread64' undeclared here (not in a function); did you mean 'pread'?
35901 | { "pread64", (sqlite3_syscall_ptr)pread64, 0 },
| ^~~~~~~
| pread
sqlite3-binding.c:35919:42: error: 'pwrite64' undeclared here (not in a function); did you mean 'pwrite'?
35919 | { "pwrite64", (sqlite3_syscall_ptr)pwrite64, 0 },
| ^~~~~~~~
| pwrite
sqlite3-binding.c: In function 'seekAndRead':
sqlite3-binding.c:35905:49: error: unknown type name 'off64_t'; did you mean 'off_t'?
35905 | #define osPread64 ((ssize_t()(int,void,size_t,off64_t))aSyscall[10].pCurrent)
| ^~~~~~~
sqlite3-binding.c:38767:11: note: in expansion of macro 'osPread64'
38767 | got = osPread64(id->h, pBuf, cnt, offset);
| ^~~~~~~~~
sqlite3-binding.c:35905:58: error: expected ')' before 'aSyscall'
35905 | #define osPread64 ((ssize_t()(int,void,size_t,off64_t))aSyscall[10].pCurrent)
| ~ ^~~~~~~~
sqlite3-binding.c:38767:11: note: in expansion of macro 'osPread64'
38767 | got = osPread64(id->h, pBuf, cnt, offset);
| ^~~~~~~~~
sqlite3-binding.c: In function 'seekAndWriteFd':
sqlite3-binding.c:35923:57: error: unknown type name 'off64_t'; did you mean 'off_t'?
35923 | #define osPwrite64 ((ssize_t()(int,const void,size_t,off64_t))
| ^~~~~~~
sqlite3-binding.c:38896:17: note: in expansion of macro 'osPwrite64'
38896 | do{ rc = (int)osPwrite64(fd, pBuf, nBuf, iOff);}while( rc<0 && errno==EINTR);
| ^~~~~~~~~~
sqlite3-binding.c:35924:21: error: expected ')' before 'aSyscall'
35924 | aSyscall[13].pCurrent)
| ^~~~~~~~
sqlite3-binding.c:38896:17: note: in expansion of macro 'osPwrite64'
38896 | do{ rc = (int)osPwrite64(fd, pBuf, nBuf, iOff);}while( rc<0 && errno==EINTR);
| ^~~~~~~~~~
sqlite3-binding.c:35923:21: note: to match this '('
35923 | #define osPwrite64 ((ssize_t()(int,const void,size_t,off64_t))
| ^
sqlite3-binding.c:38896:17: note: in expansion of macro 'osPwrite64'
38896 | do{ rc = (int)osPwrite64(fd, pBuf, nBuf, iOff);}while( rc<0 && errno==EINTR);
| ^~~~~~~~~~

make[2]: *** [Makefile:153: /home/nick/openwrt/build_dir/target-aarch64_cortex-a53_musl/crowdsec-1.4.6/.built] Error 1
make[2]: Leaving directory '/home/nick/openwrt/feeds/packages/net/crowdsec'

Maintainer: @erdoukki
Compile tested: mt7622
Run tested: no