Add log from newlib.

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