* coffread.c (coff_symfile_read): Clean up minimal symbols earlier.

	* coffread.c (coff_symfile_read): Clean up minimal symbols earlier.
	* dbxread.c (elfstab_build_psymtabs): Don't call
	install_minimal_symbols.
	(stabsect_build_psymtabs): Likewise.
	* elfread.c (elf_symfile_read): Call install_minimal_symbols
	earlier.
	* somread.c (som_symfile_read): Call install_minimal_symbols
	and do_cleanups earlier.
	* nlmread.c (nlm_symfile_read): Likewise.
	* mdebugread.c (elfmdebug_build_psymtabs): Call
	install_minimal_symbols and make appropriate cleanups.