Merge pull request #1225 from apple/fix-compiler-version-build

[Swift 2.2] Extract Version value out of optional when parsing _compiler_version
diff --git a/lib/Basic/Version.cpp b/lib/Basic/Version.cpp
index f7f9b7a..22240c6 100644
--- a/lib/Basic/Version.cpp
+++ b/lib/Basic/Version.cpp
@@ -241,7 +241,7 @@
          "Embedded Swift language version couldn't be parsed: '"
          SWIFT_COMPILER_VERSION
          "'");
-  return currentVersion;
+  return currentVersion.getValue();
 #else
   return Version();
 #endif