[SPIR-V] Add missing ScalarOpts library (#114384)

Fixes an "undefined reference to `llvm::createRegToMemWrapperPass()'"
linker error introduced by cba7055 ("[SPIR-V] Fix BB ordering &
register lifetime (#111026)", 2024-10-30).

Author: svenvh

llvm/lib/Target/SPIRV/CMakeLists.txt

@@ -56,6 +56,7 @@ add_llvm_target(SPIRVCodeGen
   MC
   SPIRVDesc
   SPIRVInfo
+  ScalarOpts
   SelectionDAG
   Support
   Target