Closes rust-lang#50019

This commit increases the dfeault stack size allocated to the
wasm32-unknown-unknown target to 1MB by default. Currently the default stack
size is one wasm page, or 64 kilobytes. This default stack is quite small and
has caused a stack overflow or two in the wild by accident.

The current "best practice" for fixing this is to pass `-Clink-args='-z
stack-size=$bigger'` but that's not great nor always easy to do. A default of
1MB matches more closely with other platforms where it's "pretty big" by
default.

Note that it was tested and if the users uses `-C link-args` to pass a custom
stack size that's still resepected as lld seems to take the first argument, and
where rustc is passing it will always be last.

When I rebased rust-lang#49991 on `master`, I messed up the merge for this line. I'm reverting this back to the way it was in f15e5c1.

…h_file_name.

Clarified E0015 message.

Closes rust-lang#46336

Added build disk usage information

Closes rust-lang#50019

…excrichton

Update stdsimd submodule

…=michaelwoerister

wasm: Increase default stack size to 1MB

This commit increases the dfeault stack size allocated to the
wasm32-unknown-unknown target to 1MB by default. Currently the default stack
size is one wasm page, or 64 kilobytes. This default stack is quite small and
has caused a stack overflow or two in the wild by accident.

The current "best practice" for fixing this is to pass `-Clink-args='-z
stack-size=$bigger'` but that's not great nor always easy to do. A default of
1MB matches more closely with other platforms where it's "pretty big" by
default.

Note that it was tested and if the users uses `-C link-args` to pass a custom
stack size that's still resepected as lld seems to take the first argument, and
where rustc is passing it will always be last.

Disable auto-detection of libxml2 when compiling llvm.

This broke cross-compiling rustc with internal llvm (with both the host and target being executable on the machine), because llvm's build system detected libxml2 on the host, therefore auto-enabled libxml2 support, but wouldn't compile as the target didn't have libxml2 installed.

…ster

Fix bad merge in rust-lang#49991

When I rebased rust-lang#49991 on `master`, I messed up the merge for this line. I'm reverting this back to the way it was in f15e5c1.

r? @michaelwoerister

must explicitly request file name when using with_file_name.

Fix rust-lang#50113