manifest: track our own  external/minigbm

Change-Id: I84cc75a20633d0c34e69e6a3f8e5097b314db5b4
diff --git a/remove.xml b/remove.xml
index c06150b..ae5cb3a 100644
--- a/remove.xml
+++ b/remove.xml
@@ -9,6 +9,7 @@
     <remove-project name="platform/external/drm_hwcomposer" />
     <remove-project name="platform/external/chromium-webview" />
     <remove-project name="platform/external/libdrm" />
+    <remove-project name="platform/external/minigbm" />
 
     <remove-project name="platform/frameworks/av" />
     <remove-project name="platform/frameworks/base" />