intel-opencl-clang: Enable shared libraries

It hapens that later-on IGC builds-up a compile-time tool called
CMCLTranslatorTool which isn't built for 'NATIVE' and rather
requires enforcing loading libLLVMGenXIntrinsics.so from
intel-vc-intrinsincs.  In turn, when built "static" (default mode),
libLLVMGenXIntrinsics.so ends-up containing llvm libraries as well,
which in turns CMCLTranslatorTool also contain, leading to a duplicate
existance of similar calls, thus segfaulting core-dump.

Note that loading build resulting libraries for this CMCLTranslatorTool
really is an ugly hack that can only work for x86_64 built on x86_64
with compatible C libraries.

cross/intel-opencl-clang-140/Makefile

@@ -66,6 +66,8 @@ CMAKE_ARGS += -DLLVM_ENABLE_ASSERTIONS=OFF
 # as a shared library, you should use the
 # LLVM_BUILD_LLVM_DYLIB option
 CMAKE_ARGS += -DBUILD_SHARED_LIBS=OFF
+CMAKE_ARGS += -DLLVM_BUILD_LLVM_DYLIB=ON
+CMAKE_ARGS += -DLLVM_LINK_LLVM_DYLIB=ON
 
 # Disable third-party benchmarks and unittest
 # as not-included in build and fails