message: Add missing quotes around doc string
diff: @@ -2,7 +2,7 @@ set(WASM_TOOLCHAIN FALSE)
  if(NOT DEFINED WASM_LLVM_CONFIG)
  if(NOT "$ENV{WASM_LLVM_CONFIG}" STREQUAL "")
  - set(WASM_LLVM_CONFIG "$ENV{WASM_LLVM_CONFIG}" CACHE FILEPATH Location of llvm-config compiled with WASM support.)
  + set(WASM_LLVM_CONFIG "$ENV{WASM_LLVM_CONFIG}" CACHE FILEPATH "Location of llvm-config compiled with WASM support.")
  endif()
  endif()
  