[codeview] use 32-bit integer for RelocOffset in DebugLinesSubsection

Summary:
RelocOffset is a 32-bit value, but we previously truncated it to 16 bits.

Fixes PR33335.

Reviewers: zturner, hiraditya!

Reviewed By: zturner

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D33968

llvm-svn: 305043

llvm/lib/DebugInfo/CodeView/DebugLinesSubsection.cpp

@@ -145,7 +145,7 @@ uint32_t DebugLinesSubsection::calculateSerializedSize() const {
 }
 
 void DebugLinesSubsection::setRelocationAddress(uint16_t Segment,
-                                                uint16_t Offset) {
+                                                uint32_t Offset) {
   RelocOffset = Offset;
   RelocSegment = Segment;
 }