hack hack hack.  this patch is very sad.

to prevent problems with mkfiles bombing out on missing directories, the
$BIN/% rule in mkmany was modified like so (this has been a problem with
installing fresh 9atom):

$BIN:
	mkdir -p $BIN

$BIN/%:	$BIN $O.%
	cp $O.$stem $BIN/$stem

this works for everything, except for /sys/src/ape/cmd where the rules

install.rc:V: $BIN/psh

$BIN/%: %.rc
	cp -x $stem.rc $BIN/$stem

give this diagnostic

mk: ambiguous recipes for /arm/bin/ape/psh:
	/arm/bin/ape/psh <-(/sys/src/cmd/mkmany:34)- /arm/bin/ape <-(/sys/src/cmd/mkmany:31)- 
	/arm/bin/ape/psh <-(mkfile:56)- psh.rc


i really don't understand why this is causing a problem, since there is no
psh.$O, and there's no way to build it.  the fix is simply to make the rule
less general.

Reference: /n/atom/patch/applied/apecmdmkhack
Date: Sun Jan  3 18:17:45 CET 2016
Signed-off-by: quanstro@quanstro.net

--- /sys/src/ape/cmd/mkfile	Sun Jan  3 18:10:31 2016
+++ /sys/src/ape/cmd/mkfile	Sun Jan  3 18:10:33 2016
@@ -52,5 +52,8 @@
 
 install.rc:V: $BIN/psh
 
-$BIN/%: %.rc
-	cp -x $stem.rc $BIN/$stem
+#$BIN/%: %.rc
+#	cp -x $stem.rc $BIN/$stem
+
+$BIN/psh: psh.rc
+	cp -x psh.rc $BIN/psh