re PR target/22209 (libgfortran unresolvable symbols on irix6.5)

re PR target/22209 (libgfortran unresolvable symbols on irix6.5)

	PR target/22209
	* config/mips/mips.h (MIN_UNITS_PER_WORD): Don't define for libgcc.
	* config/mips/_tilib.c: Remove.
	* config/fixtfdi.c: New libgcc source file.
	* config/fixunstfdi.c: New source file.
	* config/floatditf.c: New source file.
	* config/floatunditf.c: New souce file.
	* config/mips/t-iris6 (LIB2FUNCS_EXTRA): Include the new source
	files above instead of config/mips/_tilib.c.
	* config/mips/t-linux64 (LIB2FUNCS_EXTRA): Likewise.

From-SVN: r110760