Fix build error

conscrypt is no longer available for platform as it has moved to the
conscrypt APEX. That fact was reflected in base_system.mk where
PRODUCT_UPDATABLE_BOOT_JARS has 'com.android.conscrypt:conscrypt'.
However, this qemu target doesn't inherit from base_system.mk and thus
is missing PRODUCT_UPDATABLE_BOOT_JARS. Fixing the error by manually
adding the entry for conscrypt.

(I didn't inherit the entire base_system.mk because that would being
other stuff that might not necessary for the qemu target)

Bug: 147562633
Test: m with qemu_trusty_arm64
Change-Id: I059a65d91813ed32ed3c6c8587018177bf9efb31
1 file changed