pcmanfm: link against libX11 to avoid build failure

Fixes:

/home/test/outputs/allpkg/host/opt/ext-toolchain/bin/../lib/gcc/arm-linux-gnueabihf/4.7.3/../../../../arm-linux-gnueabihf/bin/ld: fm-desktop.o: undefined reference to symbol 'XSendEvent'
/home/test/outputs/allpkg/host/opt/ext-toolchain/bin/../lib/gcc/arm-linux-gnueabihf/4.7.3/../../../../arm-linux-gnueabihf/bin/ld: note: 'XSendEvent' is defined in DSO /home/test/outputs/allpkg/host/usr/arm-buildroot-linux-gnueabi/sysroot/usr/lib/libX11.so.6 so try adding it to the linker command line
/home/test/outputs/allpkg/host/usr/arm-buildroot-linux-gnueabi/sysroot/usr/lib/libX11.so.6: could not read symbols: Invalid operation
collect2: error: ld returned 1 exit status
make[4]: *** [pcmanfm] Error 1

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/pcmanfm/pcmanfm-link-against-libx11.patch

@@ -0,0 +1,20 @@
+Link against libX11
+
+fm-desktop.c uses XSendEvent, so we should link against libX11.
+
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+
+Index: b/configure.in
+===================================================================
+--- a/configure.in
++++ b/configure.in
+@@ -12,7 +12,8 @@
+ 
+ pkg_modules="gtk+-2.0 >= 2.6.0 \
+              gthread-2.0 \
+-             libstartup-notification-1.0"
++             libstartup-notification-1.0 \
++	     x11"
+ 
+ AC_FUNC_MMAP
+ 

package/pcmanfm/pcmanfm.mk

@@ -8,6 +8,7 @@ PCMANFM_SOURCE = pcmanfm-$(PCMANFM_VERSION).tar.gz
 PCMANFM_SITE = http://internap.dl.sourceforge.net/sourceforge/pcmanfm
 PCMANFM_CONF_OPT = --disable-hal
 PCMANFM_DEPENDENCIES = host-pkgconf libgtk2 gamin startup-notification xserver_xorg-server
+PCMANFM_AUTORECONF = YES
 
 $(eval $(autotools-package))