Teach googletest to use raw_ostream instead of just std::ostream.

This can break when there are implicit conversions from types raw_ostream
understands but std::ostream doesn't, but it increases the number of cases that
Just Work.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81093 91177308-0d34-0410-b5e6-96231b3b80d8

unittests/Support/ConstantRangeTest.cpp

@@ -16,13 +16,6 @@ using namespace llvm;
 
 namespace {
 
-// Support APInt output to an std::ostream.
-inline std::ostream &operator<<(std::ostream &OS, const APInt &Value) {
-  raw_os_ostream RawOS(OS);
-  RawOS << Value;
-  return OS;
-}
-
 class ConstantRangeTest : public ::testing::Test {
 protected:
   static ConstantRange Full;