Support/FileSystem: Add file_magic and move a vew clients over to it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146523 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/Path.cpp b/lib/Support/Path.cpp
index 9d8decc..dcddeda 100644
--- a/lib/Support/Path.cpp
+++ b/lib/Support/Path.cpp
@@ -152,31 +152,31 @@
 
 bool
 Path::isArchive() const {
-  LLVMFileType type;
+  fs::file_magic type;
   if (fs::identify_magic(str(), type))
     return false;
-  return type == Archive_FileType;
+  return type == fs::file_magic::archive;
 }
 
 bool
 Path::isDynamicLibrary() const {
-  LLVMFileType type;
+  fs::file_magic type;
   if (fs::identify_magic(str(), type))
     return false;
   switch (type) {
     default: return false;
-    case Mach_O_FixedVirtualMemorySharedLib_FileType:
-    case Mach_O_DynamicallyLinkedSharedLib_FileType:
-    case Mach_O_DynamicallyLinkedSharedLibStub_FileType:
-    case ELF_SharedObject_FileType:
-    case COFF_FileType:  return true;
+    case fs::file_magic::macho_fixed_virtual_memory_shared_lib:
+    case fs::file_magic::macho_dynamically_linked_shared_lib:
+    case fs::file_magic::macho_dynamically_linked_shared_lib_stub:
+    case fs::file_magic::elf_shared_object:
+    case fs::file_magic::pecoff_executable:  return true;
   }
 }
 
 bool
 Path::isObjectFile() const {
-  LLVMFileType type;
-  if (fs::identify_magic(str(), type) || type == Unknown_FileType)
+  fs::file_magic type;
+  if (fs::identify_magic(str(), type) || type == fs::file_magic::unknown)
     return false;
   return true;
 }
@@ -212,10 +212,10 @@
 
 bool
 Path::isBitcodeFile() const {
-  LLVMFileType type;
+  fs::file_magic type;
   if (fs::identify_magic(str(), type))
     return false;
-  return type == Bitcode_FileType;
+  return type == fs::file_magic::bitcode;
 }
 
 bool Path::hasMagicNumber(StringRef Magic) const {