[PATCH] build-sys: fix parallel builds w/setarch links

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From: Mike Frysinger <vapier@xxxxxxxxxxxx>

The symlink generation tries to write to the sys-utils/ subdir but does
not make sure that dir exists.  This can sometimes lead to parallel build
failures when building out-of-tree like:
...
echo ".so man8/setarch.8" > sys-utils/linux64.8
/bin/bash: sys-utils/linux64.8: No such file or directory
Makefile:11503: recipe for target 'sys-utils/linux64.8' failed
make: *** [sys-utils/linux64.8] Error 1

References: https://bugs.gentoo.org/511812
Signed-off-by: Mike Frysinger <vapier@xxxxxxxxxxxx>
---
 sys-utils/Makemodule.am | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sys-utils/Makemodule.am b/sys-utils/Makemodule.am
index a1dc042..08bb6ce 100644
--- a/sys-utils/Makemodule.am
+++ b/sys-utils/Makemodule.am
@@ -152,6 +152,7 @@ man_MANS += $(SETARCH_MAN_LINKS)
 CLEANFILES += $(SETARCH_MAN_LINKS)
 
 $(SETARCH_MAN_LINKS):
+	$(AM_V_at) test -d $(dir $@) || mkdir -p $(dir $@)
 	$(AM_V_GEN)echo ".so man8/setarch.8" > $@
 
 install-exec-hook-setarch:
-- 
2.4.0

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