Update makefiles to use filgroup syntax.

Test: mmma hardware/interfaces
Change-Id: I9f4457c78b7820c242d46359f0debe05d1b3e482
diff --git a/gatekeeper/1.0/Android.bp b/gatekeeper/1.0/Android.bp
index 89e2f39..2697e4c 100644
--- a/gatekeeper/1.0/Android.bp
+++ b/gatekeeper/1.0/Android.bp
@@ -13,8 +13,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.gatekeeper@1.0",
     srcs: [
-        "types.hal",
-        "IGatekeeper.hal",
+        ":android.hardware.gatekeeper@1.0_hal",
     ],
     out: [
         "android/hardware/gatekeeper/1.0/types.cpp",
@@ -27,8 +26,7 @@
     tools: ["hidl-gen"],
     cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.gatekeeper@1.0",
     srcs: [
-        "types.hal",
-        "IGatekeeper.hal",
+        ":android.hardware.gatekeeper@1.0_hal",
     ],
     out: [
         "android/hardware/gatekeeper/1.0/types.h",