Update the Swift version numbers reported by objdump

Summary:
Add Swift 4.1, Swift 4.2, and Swift 5 version numbers to objdump's
MachODump's print_imae_info routines. 

rdar://46548425

Reviewers: pete, lhames, bob.wilson

Reviewed By: pete, bob.wilson

Subscribers: bob.wilson, llvm-commits

Differential Revision: https://reviews.llvm.org/D55442

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@348632 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvm-objdump/MachODump.cpp b/tools/llvm-objdump/MachODump.cpp
index 6d4beb4..b5c0439 100644
--- a/tools/llvm-objdump/MachODump.cpp
+++ b/tools/llvm-objdump/MachODump.cpp
@@ -5626,7 +5626,9 @@
     else if(swift_version == 5)
       outs() << " Swift 4.0";
     else if(swift_version == 6)
-      outs() << " Swift 4.1";
+      outs() << " Swift 4.1/Swift 4.2";
+    else if(swift_version == 7)
+      outs() << " Swift 5 or later";
     else
       outs() << " unknown future Swift version (" << swift_version << ")";
   }
@@ -5677,7 +5679,9 @@
     else if(swift_version == 5)
       outs() << " Swift 4.0";
     else if(swift_version == 6)
-      outs() << " Swift 4.1";
+      outs() << " Swift 4.1/Swift 4.2";
+    else if(swift_version == 7)
+      outs() << " Swift 5 or later";
     else
       outs() << " unknown future Swift version (" << swift_version << ")";
   }