Changeset 2533e79 in rtems

sparc64/usiii: Add per-section compilation and linking support

updates #2577.

For the usiii BSP variant without this option sample executables
sizes were as follows:

text data bss dec hex filename

180608 2752 2113472 2296832 230c00 ticker.exe
114112 1760 2105312 2221184 21e480 minimum.exe

1041392 3168 2126160 3170720 3061a0 cxx_iostream.exe

712224 8912 2129200 2850336 2b7e20 fileio.exe
595248 21568 2147872 2764688 2a2f90 pppd.exe
291488 3912 2117440 2412840 24d128 capture.exe
200496 2888 2113616 2317000 235ac8 nsecs.exe
279344 3392 2114112 2396848 2492b0 paranoia.exe
324656 2768 2115328 2442752 254600 cdtest.exe
178624 2752 2113440 2294816 230420 base_sp.exe
179152 2752 2117216 2299120 2314f0 unlimited.exe
190944 2688 2113424 2307056 2333f0 hello.exe
381296 10752 2126400 2518448 266db0 loopback.exe

For the usiii BSP variant with this option sample executables sizes
were as follows:

text data bss dec hex filename

173312 2632 2113184 2289128 22ede8 ticker.exe
102432 328 2100928 2203688 21a028 minimum.exe
626544 3032 2120400 2749976 29f618 cxx_iostream.exe
657584 8792 2128640 2795016 2aa608 fileio.exe
555616 21264 2146816 2723696 298f70 pppd.exe
280016 3760 2117152 2400928 24a2a0 capture.exe
193792 2768 2113312 2309872 233ef0 nsecs.exe
238528 3264 2113808 2355600 23f190 paranoia.exe
277568 2664 2115040 2395272 248c88 cdtest.exe
170592 2624 2113152 2286368 22e320 base_sp.exe
169120 2616 2112816 2284552 22dc08 unlimited.exe
180528 2536 2109040 2292104 22f988 hello.exe
354992 10528 2126016 2491536 260490 loopback.exe