[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/BreakableToken.cpp b/clang/lib/Format/BreakableToken.cpp
index db39a95..933dce3 100644
--- a/clang/lib/Format/BreakableToken.cpp
+++ b/clang/lib/Format/BreakableToken.cpp
@@ -67,8 +67,9 @@
                                              unsigned ColumnLimit,
                                              unsigned TabWidth,
                                              encoding::Encoding Encoding) {
-  DEBUG(llvm::dbgs() << "Comment split: \"" << Text << ", " << ColumnLimit
-                     << "\", Content start: " << ContentStartColumn << "\n");
+  LLVM_DEBUG(llvm::dbgs() << "Comment split: \"" << Text << ", " << ColumnLimit
+                          << "\", Content start: " << ContentStartColumn
+                          << "\n");
   if (ColumnLimit <= ContentStartColumn + 1)
     return BreakableToken::Split(StringRef::npos, 0);
 
@@ -424,7 +425,7 @@
     }
   }
 
-  DEBUG({
+  LLVM_DEBUG({
     llvm::dbgs() << "IndentAtLineBreak " << IndentAtLineBreak << "\n";
     llvm::dbgs() << "DelimitersOnNewline " << DelimitersOnNewline << "\n";
     for (size_t i = 0; i < Lines.size(); ++i) {