Changeset 22e8c5a3 in rtems for c/src/lib/libbsp

epiphany/epiphany_sim: Add per-section compilation and linking support

updates #2577.

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

text data bss dec hex filename

198728 1792 16576900 16777420 10000cc ticker.exe

74136 1148 16702144 16777428 10000d4 minimum.exe

839480 7892 15930052 16777424 10000d0 cxx_iostream.exe
957640 6160 15813636 16777436 10000dc fileio.exe
332904 2644 16441920 16777468 10000fc capture.exe
214176 1892 16561344 16777412 10000c4 nsecs.exe
291112 2208 16484100 16777420 10000cc paranoia.exe
312096 2208 16463108 16777412 10000c4 cdtest.exe
190888 1792 16584772 16777452 10000ec base_sp.exe
196336 1824 16579268 16777428 10000d4 unlimited.exe
195344 1768 16580356 16777468 10000fc hello.exe

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

text data bss dec hex filename

187784 1752 16587908 16777444 10000e4 ticker.exe

51560 292 16725568 16777420 10000cc minimum.exe

581040 3920 16192452 16777412 10000c4 cxx_iostream.exe
930736 6112 15840580 16777428 10000d4 fileio.exe
312448 2564 16462400 16777412 10000c4 capture.exe
204424 1852 16571136 16777412 10000c4 nsecs.exe
278248 2160 16497028 16777436 10000dc paranoia.exe
296488 2088 16478852 16777428 10000d4 cdtest.exe
178024 1752 16597636 16777412 10000c4 base_sp.exe
182952 1784 16592708 16777444 10000e4 unlimited.exe
181688 1728 16594052 16777468 10000fc hello.exe