Rename 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
- Manual change to APInt
- Manually chage DOCS as regex doesn't match it.

In the transition period the DEBUG() macro is still present and aliased
to the LLVM_DEBUG() one.

Differential Revision: https://reviews.llvm.org/D43624

llvm-svn: 332240
diff --git a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldChecker.cpp b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldChecker.cpp
index 3d944bf..fa89068 100644
--- a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldChecker.cpp
+++ b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldChecker.cpp
@@ -688,12 +688,13 @@
 
 bool RuntimeDyldCheckerImpl::check(StringRef CheckExpr) const {
   CheckExpr = CheckExpr.trim();
-  DEBUG(dbgs() << "RuntimeDyldChecker: Checking '" << CheckExpr << "'...\n");
+  LLVM_DEBUG(dbgs() << "RuntimeDyldChecker: Checking '" << CheckExpr
+                    << "'...\n");
   RuntimeDyldCheckerExprEval P(*this, ErrStream);
   bool Result = P.evaluate(CheckExpr);
   (void)Result;
-  DEBUG(dbgs() << "RuntimeDyldChecker: '" << CheckExpr << "' "
-               << (Result ? "passed" : "FAILED") << ".\n");
+  LLVM_DEBUG(dbgs() << "RuntimeDyldChecker: '" << CheckExpr << "' "
+                    << (Result ? "passed" : "FAILED") << ".\n");
   return Result;
 }