Minix 3/src 02efe53bin/echo echo.c, bin/expr expr.y

Drop main() prototype.

Sync with NetBSD-8

closes #269

Change-Id: I4ce3bcbc1a1dc71745fe77bd581d07aeafc2f01b
DeltaFile
+2-4bin/echo/echo.c
+2-4bin/expr/expr.y
+2-4bin/ls/main.c
+2-4bin/sync/sync.c
+2-4bin/test/test.c
+1-2sbin/rcorder/rcorder.c
+11-226 files

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