gold patch committed: Permit two dashes with --retain-symbols-file

[Ian Lance Taylor]

The -retain-symbols-file was added as requiring exactly one dash.
There is no need for that, and that's not how GNU ld works.  I changed
it to permit either one or two dashes.  Committed to mainline.

Ian

2009-12-30  Ian Lance Taylor  <iant@google.com>

	PR 10980
	* options.h (class General_options): Permit two dashes with
	--retain-symbols-file.


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