Update object to 0.9.0

[philipc]

Also use the Object trait instead of File (see gimli-rs/object#53).

This requires gimli-rs/gimli#305.

I played a bit with using Rc/Arc<Cow<'input, [u8]>> instead of EndianRcSlice, but wasn't sure it was worth the API complexity. So I think Context::new should be the simple high level interface, and consumers with more specific needs can use Context::from_sections.

Before:

test context_new_and_query_location       ... bench:     951,031 ns/iter (+/- 79,277)
test context_new_and_query_with_functions ... bench:   1,760,225 ns/iter (+/- 54,934)
test context_new_location                 ... bench:     760,223 ns/iter (+/- 57,231)
test context_new_with_functions           ... bench:     751,183 ns/iter (+/- 55,055)
test context_query_location               ... bench:  10,378,538 ns/iter (+/- 92,496)
test context_query_with_functions         ... bench:  11,578,429 ns/iter (+/- 142,557)

After:

test context_new_and_query_location       ... bench:   5,527,469 ns/iter (+/- 285,657)
test context_new_and_query_with_functions ... bench:   6,809,893 ns/iter (+/- 490,899)
test context_new_location                 ... bench:   5,230,294 ns/iter (+/- 307,209)
test context_new_with_functions           ... bench:   5,213,000 ns/iter (+/- 266,617)
test context_query_location               ... bench:  15,353,989 ns/iter (+/- 309,998)
test context_query_with_functions         ... bench:  16,591,755 ns/iter (+/- 402,449)

For reference, Arc<Cow<[u8]>>:

test context_new_and_query_location       ... bench:   1,063,159 ns/iter (+/- 57,010)
test context_new_and_query_with_functions ... bench:   2,483,267 ns/iter (+/- 180,353)
test context_new_location                 ... bench:     758,812 ns/iter (+/- 16,336)
test context_new_with_functions           ... bench:     755,755 ns/iter (+/- 31,252)
test context_query_location               ... bench:  18,362,107 ns/iter (+/- 417,995)
test context_query_with_functions         ... bench:  19,264,415 ns/iter (+/- 260,564)

The query numbers for Arc<Cow<[u8]>> are surprising to me, but I didn't look into it.

[est31]

@philipc would you want to make a hacky experimental PR that builds on this one which has no_std support? Then I can start working on a prototype for libstd integration :).

[coveralls]

Coverage increased (+0.8%) to 82.201% when pulling fc47630 on philipc:object into c1203c6 on gimli-rs:master.

[est31]

NVM made it here https://github.com/est31/addr2line/tree/no_std_prototype

[fitzgen]

Thanks!