CMake requires normalized paths when appending.

Patch by Hugh Bellamy
Differential Revision: https://reviews.llvm.org/D30927

llvm-svn: 298100

lldb/cmake/modules/LLDBStandalone.cmake

@@ -69,6 +69,7 @@ if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
 
   set(LLVMCONFIG_FILE "${LLVM_CMAKE_PATH}/LLVMConfig.cmake")
   if(EXISTS ${LLVMCONFIG_FILE})
+    file(TO_CMAKE_PATH "${LLVM_CMAKE_PATH}" LLVM_CMAKE_PATH)
     list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_PATH}")
     include(${LLVMCONFIG_FILE})
   else()