scons: Fix build with llvm-12.
This patch fixes these SCons build errors.
/usr/bin/ld: build/linux-x86_64-debug/gallium/auxiliary/libgallium.a(lp_bld_misc.os): in function llvm::InitializeNativeTarget()': llvm/Support/TargetSelect.h:118: undefined reference to
LLVMInitializeX86TargetInfo'
/usr/bin/ld: llvm/Support/TargetSelect.h:119: undefined reference to LLVMInitializeX86Target' /usr/bin/ld: llvm/Support/TargetSelect.h:120: undefined reference to
LLVMInitializeX86TargetMC'
/usr/bin/ld: build/linux-x86_64-debug/gallium/auxiliary/libgallium.a(lp_bld_misc.os): in function llvm::InitializeNativeTargetAsmPrinter()': llvm/Support/TargetSelect.h:132: undefined reference to
LLVMInitializeX86AsmPrinter'
/usr/bin/ld: build/linux-x86_64-debug/gallium/auxiliary/libgallium.a(lp_bld_misc.os): in function llvm::InitializeNativeTargetDisassembler()': llvm/Support/TargetSelect.h:156: undefined reference to
LLVMInitializeX86Disassembler'
Signed-off-by: Vinson Lee vlee@freedesktop.org
cc: @jrfonseca @sroland