Add mod from newlib.

	* Makefile.am: Add src/newlib-mod to SUBDIRS
	* Makefile.in: Regenerate
	* analysis/simulator.in: Add newlib-mod benchmark
	* configure: Regenerate
	* configure.ac: Add src/newlib-mod/Makefile to AC_CONFIG_FILES
	* src/newlib-pow/Makefile.am: Create Makefile.am from template
	* src/newlib-pow/Makefile.in: Regenerate
	* src/newlib-pow/ef_pow.c: Import ef_fmod from newlib