man: fix src/Makefile to work with parallel make

The Makefile for man has a rule to create two generated targets with
a program run from the shell. Because the rule was run twice, with
parallel make, the generated files were being overwritten at the same
time they were being compiled. This patch forces the rule to be run
only once.

[YOCTO #9333]

(From OE-Core rev: 61f3ef6a209805577c0e731a73c4f0eab1ace748)

Signed-off-by: Bill Randle <william.c.randle@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/man/man/man-1.6g-parallel.patch

@@ -0,0 +1,30 @@
+The Makefile for man has a rule to create two generated targets with
+a program run from the shell. Because the rule was run twice, with
+parallel make, the generated files were being overwritten at the same
+time they were being compiled. This patch forces the rule to be run
+only once.
+
+Upstream-Status: Pending
+
+Signed-off-by: Bill Randle <william.c.randle at intel.com>
+
+--- man-1.6g/src/Makefile.in.orig	2010-12-31 12:28:46.000000000 -0800
++++ man-1.6g/src/Makefile.in	2016-03-28 09:09:16.845458798 -0700
+@@ -43,8 +43,10 @@
+ makemsg:
+ 	$(BUILD_CC) -o makemsg makemsg.c
+ 
+-msg.c gripedefs.h: ../msgs/mess.en makemsg
++msg.c gripedefs.h: genfiles-stamp
++genfiles-stamp: ../msgs/mess.en makemsg
+ 	./makemsg ../msgs/mess.en gripedefs.h msg.c
++	touch genfiles-stamp
+ 
+ # glob.c does not have prototypes
+ glob.o: glob.c ndir.h
+@@ -117,4 +119,4 @@
+ 
+ spotless: clean
+ 	rm -f Makefile config.status paths.h version.h man.conf
+-	rm -f gripedefs.h msg.c mess.*.cat
++	rm -f gripedefs.h msg.c mess.*.cat genfiles-stamp

meta/recipes-extended/man/man_1.6g.bb

@@ -53,6 +53,7 @@ SRC_URI = "http://pkgs.fedoraproject.org/lookaside/pkgs/man2html/${BP}.tar.gz/ba
            file://manpath.5.gz;unpack=false \
            file://man-1.6g-whatis3.patch \
            file://configure_sed.patch \
+           file://man-1.6g-parallel.patch \
 "
 
 SRC_URI[md5sum] = "ba154d5796928b841c9c69f0ae376660"