Add description for -Os and -Oz in rustc.1

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lzutao 2019-04-04 12:20:53 +07:00 committed by GitHub
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@ -261,7 +261,7 @@ full debug info with variable and type information.
.RE
.TP
\fBopt\-level\fR=\fIVAL\fR
Optimize with possible levels 0\[en]3
Optimize with possible levels 0\[en]3, s (optimize for size), or z (for minimal size)
.SH ENVIRONMENT