[MachO] Don't add symbols when processing bind fixups

The target of the bind opcode has its symbol applied when the dynamic
symbol table is parsed.

This was previously adding a symbol at the fixed-up address with the
name of the symbol being bound. This was resulting in dozens of
`_OBJC_CLASS_$_NSObject`, `_OBJC_METACLASS_$_NSObject`, and
`__objc_empty_cache` symbols being created: one for each `objc_class`
that referenced those symbols.

Author: bdash

view/macho/machoview.cpp

@@ -2876,8 +2876,6 @@ void MachoView::ParseDynamicTable(BinaryReader& reader, MachOHeader& header, BNS
 					if (name == NULL)
 						throw MachoFormatException();
 
-					DefineMachoSymbol(symtype, string(name), address, binding, true);
-
 					memset(&externReloc, 0, sizeof(externReloc));
 					externReloc.nativeType = BINARYNINJA_MANUAL_RELOCATION;
 					externReloc.address = address;
@@ -2892,8 +2890,6 @@ void MachoView::ParseDynamicTable(BinaryReader& reader, MachOHeader& header, BNS
 					if (name == NULL)
 						throw MachoFormatException();
 
-					DefineMachoSymbol(symtype, string(name), address, binding, true);
-
 					memset(&externReloc, 0, sizeof(externReloc));
 					externReloc.nativeType = BINARYNINJA_MANUAL_RELOCATION;
 					externReloc.address = address;
@@ -2909,8 +2905,6 @@ void MachoView::ParseDynamicTable(BinaryReader& reader, MachOHeader& header, BNS
 					if (name == NULL)
 						throw MachoFormatException();
 
-					DefineMachoSymbol(symtype, string(name), address, binding, true);
-
 					memset(&externReloc, 0, sizeof(externReloc));
 					externReloc.nativeType = BINARYNINJA_MANUAL_RELOCATION;
 					externReloc.address = address;
@@ -2930,8 +2924,6 @@ void MachoView::ParseDynamicTable(BinaryReader& reader, MachOHeader& header, BNS
 					uint64_t skip = readLEB128(table, tableSize, i);
 					for (; count > 0; count--)
 					{
-						DefineMachoSymbol(symtype, string(name), address, binding, true);
-
 						memset(&externReloc, 0, sizeof(externReloc));
 						externReloc.nativeType = BINARYNINJA_MANUAL_RELOCATION;
 						externReloc.address = address;
@@ -3516,9 +3508,6 @@ void MachoView::ParseChainedFixups(MachOHeader& header, linkedit_data_command ch
 								if (!entry.name.empty())
 								{
 									reloc.address = targetAddress;
-									DefineMachoSymbol(ImportAddressSymbol, entry.name,
-										targetAddress,
-										entry.weak ? WeakBinding : GlobalBinding, true);
 
 									BNRelocationInfo externReloc;
 									memset(&externReloc, 0, sizeof(externReloc));