RFA: Add debug information to MN10300 machine functions

[Nick Clifton]

Hi Jeff,

  Please can apply the attached patch ?  It adds DWARF2 debug
  information to the hand coded MN10300 functions in
  libc/machine/mn10300.  The gas switch --gdwarf-2 is used to add some
  of the information, and the call frame info is just created by hand.

  Tested by building an mn10300-elf toolchain and running the GDB
  testsuite.  It reduced the unexpected failures by about 30.

Cheers
  Nick

newlib/ChangeLog
2007-11-19  Nick Clifton  <nickc@redhat.com>

	* libc/machine/mn10300/Makefile.am (CCASFLAGS): Add -Wa,--gdwarf-2.
	* libc/machine/mn10300/Makefile.in: Regenerate.
	* libc/machine/mn10300/memchar.S: Remove redundant labels.  Add
	.debug_frame section.
	* libc/machine/mn10300/memcmp.S: Likewise.
	* libc/machine/mn10300/memcpy.S: Likewise.
	* libc/machine/mn10300/memset.S: Likewise.
	* libc/machine/mn10300/strchr.S: Likewise.
	* libc/machine/mn10300/strcmp.S: Likewise.
	* libc/machine/mn10300/strcpy.S: Likewise.
	* libc/machine/mn10300/strlen.S: Likewise.

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