…ges.

…n LLVM.

This change will fix the issue from
rust-embedded/svd2rust#130

In the case the weak count was locked, the weak_count function could
return usize::MAX. We need to test this condition manually.

Update release notes for 1.19.0

This is just #42503 there is some problems with submodules I can't seem to fix so I just created a new PR.

…lvm, r=eddyb

trans: Internalize symbols without relying on LLVM

This PR makes the compiler use the information gather by the trans collector in order to determine which symbols/trans-items can be made internal. This has the advantages:
+ of being LLVM independent,
+ of also working in incremental mode, and
+ of allowing to not keep all LLVM modules in memory at the same time.

This is in preparation for fixing issue #39280.

cc @rust-lang/compiler

Fix in weak_count in Arc in the case the weak count is locked.

In the case the weak count was locked, the weak_count function could
return usize::MAX. We need to test this condition manually.

rust-lang/cargo#4123 added the [patch] section of the manifest

[LLVM] Fix an assertion when a weak symbol is defined in global_asm.

This change will fix the issue from
rust-embedded/svd2rust#130

cc @japaric
r? @alexcrichton

Update Cargo to ffab51954ec32d55631c37a8730bb24915fc090b

rust-lang/cargo#4123 added the `[patch]` section of the manifest