libclc: Disable SPIRV targets

Building all targets fails due to the check below:

    if( "spirv-mesa3d-" IN_LIST LIBCLC_TARGETS_TO_BUILD OR "spirv64-mesa3d-" IN_LIST LIBCLC_TARGETS_TO_BUILD )
            if( NOT LLVM_SPIRV )
                    message( FATAL_ERROR "SPIR-V targets requested, but spirv-tools is not installed" )
            endif()
    endif()

The failure is:

    LLVM cxx flags:
    -I/usr/include;-std=c++14;;;-fno-exceptions;-D_GNU_SOURCE;-D__STDC_CONSTANT_MACROS;-D__STDC_FORMAT_MACROS;-D__STDC_LIMIT_MACROS;-fno-rtti;-fno-exceptions

    clang: /usr/bin/clang
    llvm-as: /usr/bin/llvm-as
    llvm-link: /usr/bin/llvm-link
    opt: /usr/bin/opt
    llvm-spirv: LLVM_SPIRV-NOTFOUND

    CMake Error at CMakeLists.txt:115 (message):
      SPIR-V targets requested, but spirv-tools is not installed

    -- Configuring incomplete, errors occurred!
    See also "/dev/shm/bee-pmenzel/libclc/libclc-12.0.1-0/build/CMakeFiles/CMakeOutput.log".

List of all targets:

*   amdgcn--
*   amdgcn--amdhsa
*   r600--
*   nvptx--
*   nvptx64--
*   nvptx--nvidiacl
*   nvptx64--nvidiacl
*   spirv-mesa3d-
*   spirv64-mesa3d-

As LLVM_SPIRV/llvm_spirv is not shipped in MarIuX, and it’s unclear how
to package it (maybe [LLVM-SPIRV-Backend][1]), do it [as Debian does
it][2], and disable the SPIRV targets, by only building the non-SPIRV
targets.

[1]: https://github.com/KhronosGroup/LLVM-SPIRV-Backend
[2]: https://salsa.debian.org/pkg-llvm-team/llvm-toolchain/-/blob/a5528e133ea546feaa48f13f734b94e5744960bc/debian/rules#L544

libclc.be0

@@ -18,9 +18,10 @@ SRCURL[0]="https://github.com/llvm/llvm-project/releases/download/llvmorg-${PKGV
 #    bee_patch "${@}"
 #}
 
-#mee_configure() {
-#    bee_configure
-#}
+mee_configure() {
+    bee_configure \
+        -DLIBCLC_TARGETS_TO_BUILD="amdgcn--;amdgcn--amdhsa;r600--;nvptx--;nvptx64--;nvptx--nvidiacl;nvptx64--nvidiacl"
+}
 
 #mee_build() {
 #    start_cmd ninja -v -C ${B} ${BEE_NINJAFLAGS} "${@}"