Add support to the MSP430 linker for the automatic placement of code and data into...

Add support to the MSP430 linker for the automatic placement of code and data into either low or high memory regions.

gas	* config/tc-msp430.c (MAX_OP_LEN): Increase to 4096.
	(msp430_make_init_symbols): New function.
	(msp430_section): Call it.
	(msp430_frob_section): Likewise.

ld	* emulparams/msp430elf.sh (TEMPLATE_NAME): Change to msp430.
	* scripttempl/msp430.sc (.text): Add .lower.text and .either.text.
	(.data): Add .lower.data and .either.data.
	(.bss): Add .lower.bss and .either.bss.
	(.rodata): Add .lower.rodata and .either.rodata.
	* emultempl/msp430.em: New file.  Implements a new orphan
	placement algorithm that divides sections between lower and upper
	memory regions.
	* Makefile.am (emsp430elf.c): Depend upon msp430.em.
	*emsp430X.c): Likewise.
	* Makefine.in: Regenerate.