[PATCH] [llgo] Roll gofrontend to a6e10414311a

[Andrew Wilkins]

LGTM with minor comment update


================
Comment at: libgo-check-failures.diff:57
@@ +56,3 @@
+ func TestSetPanicOnFault(t *testing.T) {
++	t.Skip("skipping for llgo")
++
----------------
Would be good to add a brief explanation that this is due to lack of non-call exception support.

http://reviews.llvm.org/D8828

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