display: Add libdrm in PRODUCT_PACKAGES

Change-Id: Ic4e2f9907db71ad0320959527f5dcee7399d5735
diff --git a/config/display-product-system.mk b/config/display-product-system.mk
index 231f84d..7a2511c 100644
--- a/config/display-product-system.mk
+++ b/config/display-product-system.mk
@@ -1,6 +1,7 @@
 PRODUCT_PACKAGES += libdisplayconfig \
                     libqdMetaData \
                     libqdMetaData.system \
+                    libdrm \
                     vendor.display.config@1.0 \
                     vendor.display.config@1.1 \
                     vendor.display.config@1.2 \