only one portable version of cycles.c is necessary

Reference: /n/atom/patch/applied2013/cyclesport
Date: Sun Sep 22 05:59:13 CES 2013
Signed-off-by: quanstro@quanstro.net

# rm /sys/src/libc/68000/cycles.c
# rm /sys/src/libc/68020/cycles.c
# rm /sys/src/libc/alpha/cycles.c
# rm /sys/src/libc/arm/cycles.c
# rm /sys/src/libc/mips/cycles.c
# rm /sys/src/libc/sparc/cycles.c

--- /sys/src/libc/port/cycles.c	Thu Jan  1 00:00:00 1970
+++ /sys/src/libc/port/cycles.c	Sun Sep 22 05:58:50 2013
@@ -0,0 +1,10 @@
+#include <u.h>
+#include <libc.h>
+
+#pragma profile off
+
+void
+cycles(uvlong*u)
+{
+	*u = 0LL;
+}
--- /sys/src/libc/68000/mkfile	Sun Sep 22 05:58:51 2013
+++ /sys/src/libc/68000/mkfile	Sun Sep 22 05:58:52 2013
@@ -24,7 +24,6 @@
 	strlen.s\
 
 CFILES=\
-	cycles.c\
 	notejmp.c\
 	vlrt.c\
 
--- /sys/src/libc/68020/mkfile	Sun Sep 22 05:58:53 2013
+++ /sys/src/libc/68020/mkfile	Sun Sep 22 05:58:54 2013
@@ -26,7 +26,6 @@
 	vlop.s\
 
 CFILES=\
-	cycles.c\
 	notejmp.c\
 	vlrt.c\
 
--- /sys/src/libc/alpha/mkfile	Sun Sep 22 05:58:55 2013
+++ /sys/src/libc/alpha/mkfile	Sun Sep 22 05:58:56 2013
@@ -18,7 +18,6 @@
 
 CFILES=\
 	_seek.c\
-	cycles.c\
 	notejmp.c\
 
 HFILES=/sys/include/libc.h
--- /sys/src/libc/arm/mkfile	Sun Sep 22 05:58:57 2013
+++ /sys/src/libc/arm/mkfile	Sun Sep 22 05:58:57 2013
@@ -20,7 +20,6 @@
 	vlop.s\
 
 CFILES=\
-	cycles.c\
 	notejmp.c\
 	vlrt.c\
 
--- /sys/src/libc/mips/mkfile	Sun Sep 22 05:58:58 2013
+++ /sys/src/libc/mips/mkfile	Sun Sep 22 05:58:59 2013
@@ -23,7 +23,6 @@
 	vlop.s\
 
 CFILES=\
-	cycles.c\
 	lock.c\
 	notejmp.c\
 	sqrt.c\
--- /sys/src/libc/port/mkfile	Sun Sep 22 05:59:00 2013
+++ /sys/src/libc/port/mkfile	Sun Sep 22 05:59:01 2013
@@ -19,6 +19,7 @@
 	cleanname.c\
 	crypt.c\
 	ctype.c\
+	cycles.c\
 	encodefmt.c\
 	execl.c\
 	exp.c\
--- /sys/src/libc/sparc/mkfile	Sun Sep 22 05:59:02 2013
+++ /sys/src/libc/sparc/mkfile	Sun Sep 22 05:59:03 2013
@@ -22,7 +22,6 @@
 	vlop.s
 
 CFILES=\
-	cycles.c\
 	notejmp.c\
 	sqrt.c\
 	vlrt.c\