gst-fsl-plugin: fix video not working with mfw_isink

There were two problems here:

* The 'vssconfig' files need to be removed so the displays are
  auto-configured directly.

* Fix a problem with a missing library. The code tries to 'dlopen' a
  shared library using the symbolic link instead of the soname. But the
  symbolic link is only installed with the development package PN-dev,
  so it's not available with the normal 'gst-fsl-plugin' package. Added
  patch that fixes this problem.

https://jira.digi.com/browse/DEL-167

Signed-off-by: Javier Viguera <javier.viguera@digi.com>

meta-digi-del/recipes-multimedia/gst-fsl-plugin/files/gst-fsl-plugin-2.0.3-0015-Use-library-s-SONAME-in-dlopen.patch

@@ -0,0 +1,29 @@
+From: Javier Viguera <javier.viguera@digi.com>
+Date: Tue, 21 May 2013 16:52:52 +0200
+Subject: [PATCH] Use library's SONAME in dlopen
+
+The 'libmfwba.so' symbolic link is only installed with the development
+package, and without that symlink some gstreamer pipelines (mostly using
+mfw_isink) fail with:
+
+Can not open dll, libmfwba.so: cannot open shared object file: No such file or directory.
+Caught SIGSEGV accessing address (nil)
+
+Signed-off-by: Javier Viguera <javier.viguera@digi.com>
+---
+ libs/vss/vss_common.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/libs/vss/vss_common.c b/libs/vss/vss_common.c
+index 8731da9..52cd126 100755
+--- a/libs/vss/vss_common.c
++++ b/libs/vss/vss_common.c
+@@ -86,7 +86,7 @@ static void * g_dlhandle = NULL;
+ void open_allocator_dll()
+ {
+     char * errstr;
+-    g_dlhandle = dlopen("libmfwba.so", RTLD_LAZY);
++    g_dlhandle = dlopen("libmfwba.so.0", RTLD_LAZY);
+     
+     if (!g_dlhandle) {
+         printf("Can not open dll, %s.\n", dlerror());

meta-digi-del/recipes-multimedia/gst-fsl-plugin/gst-fsl-plugin_2.0.3.bbappend

@@ -20,4 +20,11 @@ SRC_URI += " \
     file://gst-fsl-plugin-2.0.3-0012-gplay_repeat.patch \
     file://gst-fsl-plugin-2.0.3-0013-Only-call-MXCFB_SET_OVERLAY_POS-with-overlay-framebuffer.patch \
     file://gst-fsl-plugin-2.0.3-0014-Do-not-blank-the-display-on-device-close.patch \
+    file://gst-fsl-plugin-2.0.3-0015-Use-library-s-SONAME-in-dlopen.patch \
 "
+
+do_install_append() {
+    # Remove 'vssconfig' config files as we have a patch that configures
+    # the displays on the fly.
+    rm -f ${D}${datadir}/vssconfig*
+}