implement fs:[0x10] in linux

[sha0coder]

cargo run --release -- -f test/elf64lin_static_helloworld.bin  -6 -vv 

11112 0x44ab87: mov   rbx,fs:[10h]
reading FS[0x10] -> 0
11113 0x44ab90: lea   rax,[rbx+2C0h]
11114 0x44ab97: mov   [rbx+2C0h],rdx

thread 'main' panicked at libmwemu/src/maps/mod.rs:193:21:
Writing qword to unmapped region at 0x2c0