libgo patch committed: Recognize aixbigafMagic archives

[Ian Lance Taylor via Gcc-patches]

This libgo patch by Clément Chigot recognizes aixbigafMagic archives.
Bootstrapped and ran Go testsuite on x86_64-pc-linux-gnu.  Committed
to mainline.

Ian

1b785ecdc817ee14417beb1fd7389622fd8d035f
diff --git a/gcc/go/gofrontend/MERGE b/gcc/go/gofrontend/MERGE
index f79a1f04201..d8db888e4b6 100644
--- a/gcc/go/gofrontend/MERGE
+++ b/gcc/go/gofrontend/MERGE
@@ -1,4 +1,4 @@
-f2706d92d9560657333682a3de548f1f98e9f9b0
+6f309797e4f7eed635950687e902a294126e6fc6
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.
diff --git a/libgo/go/go/internal/gccgoimporter/importer.go 
b/libgo/go/go/internal/gccgoimporter/importer.go
index ff484a72fc9..391477d5a73 100644
--- a/libgo/go/go/internal/gccgoimporter/importer.go
+++ b/libgo/go/go/internal/gccgoimporter/importer.go
@@ -198,7 +198,7 @@ func GetImporter(searchpaths []string, initmap 
map[*types.Package]InitData) Impo
                        return
                }
 
-               if magics == archiveMagic {
+               if magics == archiveMagic || magics == aixbigafMagic {
                        reader, err = arExportData(reader)
                        if err != nil {
                                return