Go 1.11.1 has been released recently. It includes some changes to the
reflect package, including:

-	golang/go@a2f1c8e
-	golang/go@3afa9df
-	golang/go@58c9bd9

The second commit makes some changes to internal reflect code that
makes GopherJS reflect overrides no longer compatible, causing the
package to no longer build:

	$ gopherjs build reflect
	/usr/local/go/src/reflect/value.go:673:60: cannot use t (variable of type *rtype) as *funcType value in argument to funcLayout
	/usr/local/go/src/reflect/value.go:336:21: cannot use methodReceiver(op, v, int(v.flag) >> flagMethodShift) (value of type *rtype) as *funcType value in assignment

Specifically, the type of return value t of function methodReceiver
was changed from *rtype to *funcType in commit golang/go@3afa9df.

This change updates the native reflect override for methodReceiver
function and Value.call method accordingly.

Regenerate natives with:

	go generate ./compiler/natives

Use Go 1.11.1 in CI.

Bump GopherJS version to GopherJS 1.11-2.

Fixes #862.

Go 1.11.1 has been released recently. It includes some changes to the
reflect package, including:

-	golang/go@a2f1c8e
-	golang/go@3afa9df
-	golang/go@58c9bd9

The second commit makes some changes to internal reflect code that
makes GopherJS reflect overrides no longer compatible, causing the
package to no longer build:

	$ gopherjs build reflect
	/usr/local/go/src/reflect/value.go:673:60: cannot use t (variable of type *rtype) as *funcType value in argument to funcLayout
	/usr/local/go/src/reflect/value.go:336:21: cannot use methodReceiver(op, v, int(v.flag) >> flagMethodShift) (value of type *rtype) as *funcType value in assignment

Specifically, the type of return value t of function methodReceiver
was changed from *rtype to *funcType in commit golang/go@3afa9df.

This change updates the native reflect override for methodReceiver
function and Value.call method accordingly.

Maintain backwards compatibility with Go 1.11(.0) by creating
a custom go1.11.1 release tag (to be applied whenever Go version
is 1.11.1 or greater) and using it to select the appropriate overrides
for the reflect package for Go 1.11.1 and Go 1.11(.0).

This way, GopherJS 1.11-2 will function with Go 1.11.1 and Go 1.11(.0)
versions, rather than only with Go 1.11.1.

Regenerate natives with:

	go generate ./compiler/natives

Use Go 1.11.1 in CI.

Bump GopherJS version to GopherJS 1.11-2.

Fixes #862.

GopherJS 1.12 is out by now, so it's safe to remove this code that
was added to deal with differences between Go 1.11.0 and Go 1.11.1.

There should not be any change in behavior, except the internal and
temporary go1.11.1 build tag will no longer be set by GopherJS.
It was never intended to be used externally, so hopefully nobody did.

Regenerate ./compiler/natives.

Updates #862.

GopherJS 1.12 is out by now, so it's safe to remove this code that
was added to deal with differences between Go 1.11.0 and Go 1.11.1.

Do so by moving the actively used code from reflect_go1111.go back
into reflect.go as it was before PR #865, and delete reflect_go111.go.

There should not be any change in behavior.

Regenerate ./compiler/natives.

Updates #862.