[PATCH] Sync toplevel ltmain.sh with gcc

[Dave Korn]

    Hi folks,

  The attached patch backports a new feature that has already been accepted
for upstream libtool; it adds a new option to control where DLLs get installed
to on Windows and other PE platforms.

  It was approved and applied to GCC, so this patch is necessary to sync /src.
 It incorporates the one tiny bugfix that was discovered to be needed there
straight off.

  I'm just giving it a quick build-and-install test; it should make no
difference in /src because we aren't building DLLs for anything anyway, and
even if we were it won't alter the original default behaviour without manually
adding a -bindir option to a makefile somewhere.

ChangeLog:

	* ltmain.sh (func_normal_abspath): New function.
	(func_relative_path): Likewise.
	(func_mode_help): Document new -bindir option for link mode.
	(func_mode_link): Add new -bindir option, and use it to place
	output DLL if specified.

  Will check it in late this afternoon unless anyone shouts not to.

    cheers,
      DaveK


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