[dsymutil] Embed toolchain in dSYM bundle

Allow us to embed the (Xcode) toolchain in the dSYM bundle's property
list.

Differential revision: https://reviews.llvm.org/D44151

llvm-svn: 326994
diff --git a/llvm/docs/CommandGuide/dsymutil.rst b/llvm/docs/CommandGuide/dsymutil.rst
index 2782da3..a89ee18 100644
--- a/llvm/docs/CommandGuide/dsymutil.rst
+++ b/llvm/docs/CommandGuide/dsymutil.rst
@@ -74,6 +74,10 @@
 
  Dumps the symbol table found in *executable* or object file(s) and exits.
 
+.. option:: --toolchain
+
+ Embed the toolchain in the dSYM bundle's property list.
+
 .. option:: -u, --update
 
  Update an existing dSYM file to contain the latest accelerator tables and