Make the ELF linker handle orphaned sections reasonably. Also,

	define __start_SECNAME and __stop_SECNAME around sections whose
	names can be represented in C, for the benefit of symbol sets in
	glibc.
	* ldemul.h (ldemul_place_orphan): Declare.
	(ld_emulation_xfer_type): Add place_orphan field.
	* ldemul.c (ldemul_place_orphan): New function.
	* ldlang.h (wild_doit): Declare.
	* ldlang.c (wild_doit): Make nonstatic.
	(lang_place_orphans): Call ldemul_place_orphan.
	* emultempl/elf32.em: Include <ctype.h> and "ldgram.h".
	(hold_section, hold_use, hold_text, hold_data, hold_bss): New
	static variables.
	(gld${EMULATION_NAME}_place_orphan): New static function.
	(gld${EMULATION_NAME}_place_section): New static function.
	(ld_${EMULATION_NAME}_emulation): Initialize place_orphan field.

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