K 10
svn:author
V 5
markj
K 8
svn:date
V 27
2018-06-01T23:42:10.290981Z
K 7
svn:log
V 166
Don't export _end on arm64 and riscv.

These platforms don't support brk() and sbrk(), which are the reason
for exporting _end in the first place.

MFC after:	1 week

END