[llvm] [CI] Try lowering max parallel link jobs on Windows (PR #185255)

[via llvm-commits]

github-actions[bot] wrote:

<!--PREMERGE ADVISOR COMMENT: Linux-->
# :penguin: Linux x64 Test Results

* 138628 tests passed
* 1972 tests skipped

All executed tests passed, but another part of the build **failed**. Click on a failure below to see the details.

<details>
<summary>libclc/obj.libclc.dir/amdgcn--/opencl/lib/amdgcn/async/wait_group_events.cl.bc /home/gha/actions-runner/_work/llvm-project/llvm-project/build/runtimes/runtimes-bins/libclc/obj.libclc.dir/amdgcn--/opencl/lib/amdgcn/async/wait_group_events.cl.bc</summary>

```
FAILED: libclc/obj.libclc.dir/amdgcn--/opencl/lib/amdgcn/async/wait_group_events.cl.bc /home/gha/actions-runner/_work/llvm-project/llvm-project/build/runtimes/runtimes-bins/libclc/obj.libclc.dir/amdgcn--/opencl/lib/amdgcn/async/wait_group_events.cl.bc
cd /home/gha/actions-runner/_work/llvm-project/llvm-project/build/runtimes/runtimes-bins/libclc && /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-23 -target amdgcn-- -c -nostdlib -nostdlibinc -Xclang -mcode-object-version=none -cl-std=CL3.0 -DCLC_AMDGCN -I/home/gha/actions-runner/_work/llvm-project/llvm-project/libclc/clc/include -include opencl-c-base.h -Werror=undef -Wall -Wextra -fdiscard-value-names -ffp-contract=fast-honor-pragmas -fdenormal-fp-math=dynamic -D__CLC_PRIVATE_ADDRSPACE_VAL=5 -D__CLC_GENERIC_ADDRSPACE_VAL=0 -Xclang -fdeclare-opencl-builtins -I/home/gha/actions-runner/_work/llvm-project/llvm-project/libclc/opencl/include -I/home/gha/actions-runner/_work/llvm-project/llvm-project/libclc/opencl/lib/amdgcn/async -MD -MF /home/gha/actions-runner/_work/llvm-project/llvm-project/build/runtimes/runtimes-bins/libclc/obj.libclc.dir/amdgcn--/opencl/lib/amdgcn/async/wait_group_events.cl.bc.d -MT /home/gha/actions-runner/_work/llvm-project/llvm-project/build/runtimes/runtimes-bins/libclc/obj.libclc.dir/amdgcn--/opencl/lib/amdgcn/async/wait_group_events.cl.bc -cl-no-stdinc -emit-llvm -o /home/gha/actions-runner/_work/llvm-project/llvm-project/build/runtimes/runtimes-bins/libclc/obj.libclc.dir/amdgcn--/opencl/lib/amdgcn/async/wait_group_events.cl.bc -x cl /home/gha/actions-runner/_work/llvm-project/llvm-project/libclc/opencl/lib/amdgcn/async/wait_group_events.cl && /usr/bin/cmake -E cmake_transform_depfile Ninja gccdepfile /home/gha/actions-runner/_work/llvm-project/llvm-project/runtimes /home/gha/actions-runner/_work/llvm-project/llvm-project/libclc /home/gha/actions-runner/_work/llvm-project/llvm-project/build/runtimes/runtimes-bins /home/gha/actions-runner/_work/llvm-project/llvm-project/build/runtimes/runtimes-bins/libclc /home/gha/actions-runner/_work/llvm-project/llvm-project/build/runtimes/runtimes-bins/libclc/obj.libclc.dir/amdgcn--/opencl/lib/amdgcn/async/wait_group_events.cl.bc.d /home/gha/actions-runner/_work/llvm-project/llvm-project/build/runtimes/runtimes-bins/CMakeFiles/d/efa645a47dd0a62c124cae2400795d7979088a48b4173d1d5db910ed3fbfe5b3.d
/home/gha/actions-runner/_work/llvm-project/llvm-project/libclc/opencl/lib/amdgcn/async/wait_group_events.cl:18:54: error: OpenCL C version 3.0 does not support the '__generic' type qualifier
18 | _CLC_DEF _CLC_OVERLOAD void wait_group_events(int n, __generic event_t *evs) {
|                                                      ^
/home/gha/actions-runner/_work/llvm-project/llvm-project/libclc/opencl/lib/amdgcn/async/wait_group_events.cl:18:29: error: redefinition of 'wait_group_events'
18 | _CLC_DEF _CLC_OVERLOAD void wait_group_events(int n, __generic event_t *evs) {
|                             ^
/home/gha/actions-runner/_work/llvm-project/llvm-project/libclc/opencl/lib/amdgcn/async/wait_group_events.cl:11:29: note: previous definition is here
11 | _CLC_DEF _CLC_OVERLOAD void wait_group_events(int n, __private event_t *evs) {
|                             ^
2 errors generated.
```
</details>

If these failures are unrelated to your changes (for example tests are broken or flaky at HEAD), please open an issue at https://github.com/llvm/llvm-project/issues and add the `infrastructure` label.

https://github.com/llvm/llvm-project/pull/185255