Add helper script to update all hidl makefiles.

Until b/35570956 is fixed, we need to automatically generate makefiles
in order to allow hal files to be built by the build system. Adding
a script which just updates all of the Google makefiles at once
to make hidl-gen changes easier.

Test: ran script, checked output directories.
Change-Id: I4bec1d43f5c8389904cdc919d9406996720c7df5
diff --git a/update-all-google-makefiles.sh b/update-all-google-makefiles.sh
new file mode 100755
index 0000000..7491ac6
--- /dev/null
+++ b/update-all-google-makefiles.sh
@@ -0,0 +1,10 @@
+#!/bin/bash
+
+# TODO(b/35570956): replace makefile generation with something like 'hidl_interface' in a Soong module
+
+$ANDROID_BUILD_TOP/system/libhidl/update-makefiles.sh
+$ANDROID_BUILD_TOP/hardware/interfaces/update-makefiles.sh
+$ANDROID_BUILD_TOP/frameworks/hardware/interfaces/update-makefiles.sh
+$ANDROID_BUILD_TOP/system/hardware/interfaces/update-makefiles.sh
+
+$ANDROID_BUILD_TOP/system/tools/hidl/test/vendor/1.0/update-makefile.sh