xserver_xorg-server: Fix race condition when installing man pages

Reproduced the bug using BR2_JLEVEL=16

Fixes race condition by disabling parallel make in man/

http://autobuild.buildroot.net/results/11e/11ece737078ca8da2fee4249432148675b4e630e/
http://autobuild.buildroot.net/results/a95/a952932b832ee3296d6c225c7a9df408ca3eef9f/

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/x11r7/xserver_xorg-server/xserver_xorg-server-400-fix-man.patch

@@ -0,0 +1,19 @@
+Fix race condition when installing man page
+
+Fixes
+http://autobuild.buildroot.net/results/11e/11ece737078ca8da2fee4249432148675b4e630e/
+http://autobuild.buildroot.net/results/a95/a952932b832ee3296d6c225c7a9df408ca3eef9f/
+
+Patch sent upstream: https://bugs.freedesktop.org/show_bug.cgi?id=79396
+
+Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
+
+diff -uNr xorg-server-1.15.1.org/man/Makefile.am xorg-server-1.15.1/man/Makefile.am
+--- xorg-server-1.15.1.org/man/Makefile.am	2014-03-22 06:37:53.000000000 +0100
++++ xorg-server-1.15.1/man/Makefile.am	2014-05-29 09:27:48.808356591 +0200
+@@ -4,3 +4,5 @@
+ 
+ include $(top_srcdir)/manpages.am
+ appman_PRE = Xserver.man
++
++.NOTPARALLEL:

package/x11r7/xserver_xorg-server/xserver_xorg-server.mk

@@ -9,6 +9,7 @@ XSERVER_XORG_SERVER_SOURCE = xorg-server-$(XSERVER_XORG_SERVER_VERSION).tar.bz2
 XSERVER_XORG_SERVER_SITE = http://xorg.freedesktop.org/releases/individual/xserver
 XSERVER_XORG_SERVER_LICENSE = MIT
 XSERVER_XORG_SERVER_LICENSE_FILES = COPYING
+XSERVER_XORG_SERVER_AUTORECONF = YES
 XSERVER_XORG_SERVER_INSTALL_STAGING = YES
 XSERVER_XORG_SERVER_INSTALL_STAGING_OPT = DESTDIR=$(STAGING_DIR) install install-data
 XSERVER_XORG_SERVER_DEPENDENCIES = 	\
@@ -53,6 +54,7 @@ XSERVER_XORG_SERVER_DEPENDENCIES = 	\
 	xkeyboard-config		\
 	pixman 				\
 	mcookie 			\
+	host-xfont_font-util		\
 	host-pkgconf
 
 XSERVER_XORG_SERVER_CONF_OPT = --disable-config-hal \