document the new -W options, and document the -x option added to pcc

Reference: /n/sources/patch/applied/8c-pcc-man-update
Date: Wed Mar  6 18:11:27 CET 2013
Signed-off-by: charles.forsyth@gmail.com

--- /sys/man/1/8c	Wed Mar  6 18:11:11 2013
+++ /sys/man/1/8c	Wed Mar  6 18:11:08 2013
@@ -109,6 +109,11 @@
 .B -w
 Print warning messages about unused variables, etc.
 .TP
+.B -W
+Print all the messages that
+.B -w
+would print as warnings, but make them errors.
+.TP
 .B -B
 Accept functions without a new-style
 ANSI C function prototype.
--- /sys/man/1/pcc	Wed Mar  6 18:11:15 2013
+++ /sys/man/1/pcc	Wed Mar  6 18:11:13 2013
@@ -59,6 +59,11 @@
 .B -w
 Print compiler warning messages.
 .TP
+.B -W
+Print all the messages that
+.B -w
+would print as warnings, but make them errors.
+.TP
 .BI -l lib
 Include
 .BI / $objtype /lib/ape/lib lib .a
@@ -77,6 +82,10 @@
 .B -v
 Echo the preprocessing, compiling, and loading commands
 before they are executed.
+.TP
+.BI -x " file"
+Produce an export file in the executable, as described in
+.IR 8l (1).
 .TP
 .BI -D name=def
 .br