[libclc] libclc: Fix missing clc prefixes on some clc files (PR #185679)

[Wenju He via cfe-commits]

wenju-he wrote:

> I'm seeing test regressions after this change:
> 
> ```
> Start testing: Mar 11 13:54 UTC
> ----------------------------------------------------------
> 1/1 Testing: external-funcs-libclc-amdgcn-amd-amdhsa-llvm
> 1/1 Test: external-funcs-libclc-amdgcn-amd-amdhsa-llvm
> Command: "/var/tmp/portage/llvm-core/libclc-23.0.0.9999/work/libclc/check_external_funcs.sh" "/var/tmp/portage/llvm-core/libclc-23.0.0.9999/work/libclc_build/amdgcn-amd-amdhsa-llvm/libclc.bc" "/usr/lib/llvm/23/bin"
> Directory: /var/tmp/portage/llvm-core/libclc-23.0.0.9999/work/libclc
> "external-funcs-libclc-amdgcn-amd-amdhsa-llvm" start time: Mar 11 13:54 UTC
> Output:
> ----------------------------------------------------------
> ERROR: 4 unresolved external functions detected in /var/tmp/portage/llvm-core/libclc-23.0.0.9999/work/libclc_build/amdgcn-amd-amdhsa-llvm/libclc.bc
> declare hidden i32 @_Z15__clc_get_fencePv(ptr noundef) local_unnamed_addr #1
> declare hidden ptr addrspace(1) @_Z15__clc_to_globalPv(ptr noundef) local_unnamed_addr #1
> declare hidden ptr addrspace(3) @_Z14__clc_to_localPv(ptr noundef) local_unnamed_addr #1
> declare hidden ptr addrspace(5) @_Z16__clc_to_privatePv(ptr noundef) local_unnamed_addr #1
> <end of output>
> Test time =   1.54 sec
> ----------------------------------------------------------
> Test Failed.
> "external-funcs-libclc-amdgcn-amd-amdhsa-llvm" end time: Mar 11 13:54 UTC
> "external-funcs-libclc-amdgcn-amd-amdhsa-llvm" time elapsed: 00:00:01
> ----------------------------------------------------------
> 
> End testing: Mar 11 13:54 UTC
> ```
> 
> (That said, main is currently completely broken after #185788.)

will be addressed in https://github.com/llvm/llvm-project/pull/186015

https://github.com/llvm/llvm-project/pull/185679