Linux cmake build fixes/improvments for autobuild builds. (!standalone)

Instead of letting the linker search for libs, use cmake to find the prebuilt libs so that the linker will only link to said
libs and not any system libs it may have found.
TODO: Expand this to other prebuilt libs instead of the UI ones.

indra/cmake/UI.cmake

@@ -34,13 +34,13 @@ if (STANDALONE)
 else (STANDALONE)
   use_prebuilt_binary(gtk-atk-pango-glib)
   if (LINUX)
-    set(UI_LIBRARIES
+    set(UI_LIB_NAMES
         freetype
         atk-1.0
         gdk-x11-2.0
         gdk_pixbuf-2.0
-        Xinerama
         glib-2.0
+        gio-2.0
         gmodule-2.0
         gobject-2.0
         gthread-2.0
@@ -49,8 +49,18 @@ else (STANDALONE)
         pangoft2-1.0
         pangox-1.0
         pangoxft-1.0
-        ${FREETYPE_LIBRARIES}
         )
+    foreach(libname ${UI_LIB_NAMES})
+      find_library(UI_LIB_${libname}
+                   NAMES ${libname}
+                   PATHS
+                     debug ${LIBS_PREBUILT_DIR}/lib/debug
+                     optimized ${LIBS_PREBUILT_DIR}/lib/release
+                   NO_DEFAULT_PATH
+                   )
+      set(UI_LIBRARIES ${UI_LIBRARIES} ${UI_LIB_${libname}})
+    endforeach(uilibname)
+    set(UI_LIBRARIES ${UI_LIBRARIES} Xinerama)
   endif (LINUX)
 
   include_directories (