Add goto-ld to .gitignore.

Author: NlightNFotis

.gitignore

@@ -108,6 +108,7 @@ src/goto-analyzer/goto-analyzer
 src/goto-analyzer/goto-analyzer.exe
 src/goto-cc/goto-cc
 src/goto-cc/goto-gcc
+src/goto-cc/goto-ld
 src/goto-cc/goto-cc.exe
 src/goto-cc/goto-cl.exe
 src/goto-harness/goto-harness