Use 'static const char' instead of 'static const int'.

Due to darwin gcc bug, one version of darwin linker coalesces
static const int, which defauts PassID based pass identification.

llvm-svn: 36652

llvm/lib/Analysis/LoopInfo.cpp

@@ -27,7 +27,7 @@
 #include <ostream>
 using namespace llvm;
 
-const int LoopInfo::ID = 0;
+const char LoopInfo::ID = 0;
 static RegisterPass<LoopInfo>
 X("loops", "Natural Loop Construction", true);