…eration

These were intended to land in stable 1.8 but were just waiting for the
implementation PR, so now they're landing. Specifically this PR stabilizes:

* `AsciiExt::into_ascii_uppercase`
* `AsciiExt::into_ascii_lowercase`
* `AsciiExt for Vec<u8>`
* `AsciiExt for String`

Right now everything in TARGET_CRATES is built by default for all non-fulldeps
tests and is distributed by default for all target standard library packages.
Currenly this includes a number of unstable crates which are rarely used such as
`graphviz` and `rbml`>

This commit trims down the set of `TARGET_CRATES`, moves a number of tests to
`*-fulldeps` as a result, and trims down the dependencies of libtest so we can
distribute fewer crates in the `rust-std` packages.

These targets don't link statically to libunwind or libc

Fixes rust-lang#30891

…arth

Issue here : rust-lang#31991

Right now everything in TARGET_CRATES is built by default for all non-fulldeps
tests and is distributed by default for all target standard library packages.
Currenly this includes a number of unstable crates which are rarely used such as
`graphviz` and `rbml`>

This commit trims down the set of `TARGET_CRATES`, moves a number of tests to
`*-fulldeps` as a result, and trims down the dependencies of libtest so we can
distribute fewer crates in the `rust-std` packages.

…r=brson

These were intended to land in stable 1.8 but were just waiting for the
implementation PR, so now they're landing. Specifically this PR stabilizes:

* `AsciiExt::into_ascii_uppercase`
* `AsciiExt::into_ascii_lowercase`
* `AsciiExt for Vec<u8>`
* `AsciiExt for String`

- Empty `.sidebar .location` caused "grey line" on top of the documentation page (under 700px) fixed.
- `.sidebar .location` appearance improvement in responsive mode.

These targets don't link statically to libunwind or libc

---

r? @alexcrichton

Fixes rust-lang#30891

r? @eddyb

Just take out the `NOTE` and the `#[allow(improper_ctypes)]`