Use __func__ rather than __FUNCTION__

We already use C99's __func__ in places, use it more generally.  This
patch doesn't change uses in the testsuite.  I've also left one in
gold.h that is protected by GCC_VERSION < 4003.  If any of the
remaining uses bothers anyone I invite patches.

bfd/
	* bfd-in.h: Replace __FUNCTION__ with __func__.
	* elf32-bfin.c: Likewise.
	* elfnn-aarch64.c: Likewise.
	* elfxx-sparc.c: Likewise.
	* bfd-in2.h: Regenerate.
gas/
	* config/tc-cris.c: Replace __FUNCTION__ with __func__.
	* config/tc-m68hc11.c: Likewise.
	* config/tc-msp430.c: Likewise.
gold/
	* dwp.h: Replace __FUNCTION__ with __func__.
	* gold.h: Likewise, except for use inside GCC_VERSION < 4003.
ld/
	* emultempl/pe.em: Replace __FUNCTION__ with __func__.
	* emultempl/pep.em: Likewise.
	* pe-dll.c: Likewise.