[OE-core] [PATCH] mesa-common: Fix confused variable assignment/comment

[Richard Purdie]

Its clear this was meant to be a prepend. Also fix an out
of date comment.

Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>
---
diff --git a/meta/recipes-graphics/mesa/mesa-common.inc b/meta/recipes-graphics/mesa/mesa-common.inc
index 1ff08fb..aa26aee 100644
--- a/meta/recipes-graphics/mesa/mesa-common.inc
+++ b/meta/recipes-graphics/mesa/mesa-common.inc
@@ -18,8 +18,8 @@ DEPENDS = "expat makedepend-native flex-native bison-native"
 
 PROVIDES = "virtual/libgl virtual/libgles1 virtual/libgles2 virtual/egl"
 
-# for mesa-dri and mesa-xlib
-FILESEXTRAPATHS_append := "${THISDIR}/mesa:"
+# for mesa-dri
+FILESEXTRAPATHS_prepend := "${THISDIR}/mesa:"
 
 inherit autotools pkgconfig pythonnative