fixed comments/restored original target

Author: Bar Soloveychik

lldb/unittests/Instruction/CMakeLists.txt

@@ -5,17 +5,19 @@ add_lldb_unittest(EmulatorTests
 
   LINK_COMPONENTS
     Support
-    ${LLVM_TARGETS_TO_BUILD}
   LINK_LIBS
     lldbCore
     lldbSymbol
     lldbTarget
     lldbPluginInstructionARM64
     lldbPluginInstructionLoongArch
     lldbPluginInstructionRISCV
-    lldbPluginProcessUtility
   )
 
+# Only add RISCV emulator tests if RISCV is in the list of LLVM targets to build.
+# This is necessary because some buildbots (e.g., X86-only machines) 
+# do not have RISCV support enabled. Without this check, the RISCV tests would be added
+# causing build failures.
 if ("RISCV" IN_LIST LLVM_TARGETS_TO_BUILD)
   add_lldb_unittest(RISCVEmulatorTests
     RISCV/TestRiscvInstEmulation.cpp