[clang] Update uses of DEBUG macro to LLVM_DEBUG.

The DEBUG() macro is very generic so it might clash with other projects.
The renaming was done as follows:
- git grep -l 'DEBUG' | xargs sed -i 's/\bDEBUG\s\?(/LLVM_DEBUG(/g'
- git diff -U0 master | ../clang/tools/clang-format/clang-format-diff.py -i -p1 -style LLVM

Explicitly avoided changing the strings in the clang-format tests.

Differential Revision: https://reviews.llvm.org/D44975

llvm-svn: 332350
diff --git a/clang/lib/Format/Format.cpp b/clang/lib/Format/Format.cpp
index 53db932..f3681a7 100644
--- a/clang/lib/Format/Format.cpp
+++ b/clang/lib/Format/Format.cpp
@@ -930,9 +930,9 @@
     // Ensure that each language is configured at most once.
     for (unsigned j = 0; j < i; ++j) {
       if (Styles[i].Language == Styles[j].Language) {
-        DEBUG(llvm::dbgs()
-              << "Duplicate languages in the config file on positions " << j
-              << " and " << i << "\n");
+        LLVM_DEBUG(llvm::dbgs()
+                   << "Duplicate languages in the config file on positions "
+                   << j << " and " << i << "\n");
         return make_error_code(ParseError::Error);
       }
     }
@@ -2146,7 +2146,7 @@
     SmallString<128> ConfigFile(Directory);
 
     llvm::sys::path::append(ConfigFile, ".clang-format");
-    DEBUG(llvm::dbgs() << "Trying " << ConfigFile << "...\n");
+    LLVM_DEBUG(llvm::dbgs() << "Trying " << ConfigFile << "...\n");
 
     Status = FS->status(ConfigFile.str());
     bool FoundConfigFile =
@@ -2155,7 +2155,7 @@
       // Try _clang-format too, since dotfiles are not commonly used on Windows.
       ConfigFile = Directory;
       llvm::sys::path::append(ConfigFile, "_clang-format");
-      DEBUG(llvm::dbgs() << "Trying " << ConfigFile << "...\n");
+      LLVM_DEBUG(llvm::dbgs() << "Trying " << ConfigFile << "...\n");
       Status = FS->status(ConfigFile.str());
       FoundConfigFile = Status && (Status->getType() ==
                                    llvm::sys::fs::file_type::regular_file);
@@ -2177,7 +2177,8 @@
         return make_string_error("Error reading " + ConfigFile + ": " +
                                  ec.message());
       }
-      DEBUG(llvm::dbgs() << "Using configuration file " << ConfigFile << "\n");
+      LLVM_DEBUG(llvm::dbgs()
+                 << "Using configuration file " << ConfigFile << "\n");
       return Style;
     }
   }