scons: Fix xlib build.

After glsl rework merge.

src/gallium/winsys/xlib/SConscript

@@ -51,7 +51,7 @@ if env['platform'] == 'linux' \
     libgl = env.SharedLibrary(
         target ='GL',
         source = sources,
-        LIBS = st_xlib + glapi + mesa + drivers + auxiliaries + env['LIBS'],
+        LIBS = st_xlib + glapi + mesa + glsl + drivers + auxiliaries + env['LIBS'],
     )
 
     env.InstallSharedLibrary(libgl, version=(1, 5))

src/glsl/SConscript

@@ -23,7 +23,7 @@ sources = [
     'cl/sl_cl_parse.c',
 ]
 
-glsl = env.StaticLibrary(
+glsl = env.ConvenienceLibrary(
     target = 'glsl',
     source = sources,
 )