Simplify the handling of pcrel relocations on ELF. Now we do the right thing
for all symbol differences and can drop the old EmitPCRelSymbolValue
method.

This also make getExprForFDESymbol on ELF equal to the one on MachO, and it
can be made non-virtual.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130634 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/lto/LTOModule.cpp b/tools/lto/LTOModule.cpp
index d9f5fa5..8f2b1f4 100644
--- a/tools/lto/LTOModule.cpp
+++ b/tools/lto/LTOModule.cpp
@@ -582,7 +582,7 @@
                                 uint64_t Size, unsigned ByteAlignment) {}
     virtual void EmitBytes(StringRef Data, unsigned AddrSpace) {}
     virtual void EmitValueImpl(const MCExpr *Value, unsigned Size,
-                               bool isPCRel, unsigned AddrSpace) {}
+                               unsigned AddrSpace) {}
     virtual void EmitULEB128Value(const MCExpr *Value) {}
     virtual void EmitSLEB128Value(const MCExpr *Value) {}
     virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,