[Patch, testsuite] test g++.dg/tls for emutls targets.

[IainS]

whilst resolving PR43602 I noticed that some of the tls tests have  
require "tls_native" whereas AFAICT they are equally applicable to  
emutls.

The attached patch/changelog enables those tests on emutls targets
regtested on i686-apple-darwin-9, powerpc-apple-darwin9, i686-pc-linux.

gcc/testsuite/Changelog:
	* g++.dg/tls/init-1.C: Allow test for all tls targets.
	* g++.dg/tls/init-2.C: Ditto.
	* g++.dg/tls/diag-1.C: Ditto.
	* g++.dg/tls/diag-2.C: Ditto.
	* g++.dg/tls/diag-3.C: Ditto.
	* g++.dg/tls/diag-4.C: Ditto.
	* g++.dg/tls/static-1.C: Ditto.
	* g++.dg/tls/diag-5.C: Ditto.
	* g++.dg/tls/static-1a.cc: Ditto.
	* g++.dg/tls/trivial.C: Ditto.

Iain

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