targets/dri: update scons build to handle __driDriverGetExtensions_vmwgfx

Cc: Jose Fonseca <jfonseca@vmware.com>
Cc: Brian Paul <brianp@vmware.com>
Cc: Jakob Bornecrantz <jakob@vmware.com>
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Tested-by: Rob Clark <robclark@freedesktop.org>
Tested-by: Thomas Helland <thomashelland90 at gmail.com>
Acked-by: Tom Stellard <thomas.stellard@amd.com>

src/gallium/targets/dri/SConscript

@@ -8,6 +8,10 @@ if env['suncc']:
 
 env.Append(CPPPATH = [
     '#/src/loader',
+    '#/src/mapi',
+    '#/src/mesa',
+    '#/src/mesa/drivers/dri/common',
+    '#/src/gallium/state_trackers/dri/common',
 ])
 
 if env['build'] == 'release':
@@ -19,6 +23,7 @@ else:
 
 env.Append(CPPDEFINES = [
     'GALLIUM_VMWGFX',
+    'DRI_TARGET',
 ])
 
 env.Prepend(LIBS = [