Basic: convert UUIDs to uppercase

Darwin does not follow the ITEF specification (RFC 4122) and emits the UUID in
uppercase and expects the emission to be uppercase.  Convert to upper case when
translating the UUID from the binary representation to the string
representation.  This repairs the SIL parsing tests on Windows.

Author: compnerd

lib/Basic/UUID.cpp

@@ -23,6 +23,7 @@
 #define NOMINMAX
 #include <objbase.h>
 #include <string>
+#include <algorithm>
 #else
 #include <uuid/uuid.h>
 #endif
@@ -94,6 +95,7 @@ void swift::UUID::toString(llvm::SmallVectorImpl<char> &out) const {
 
   char* signedStr = reinterpret_cast<char*>(str);
   memcpy(out.data(), signedStr, StringBufferSize);
+  std::transform(std::begin(out), std::end(out), std::begin(out), toupper);
 #else
   uuid_unparse_upper(Value, out.data());
 #endif