ANDROID: fix up __NR_compat_syscalls number due to build breakage.

In commit d8b0f546 ("wire up syscalls for statmount/listmount"), the
__NR_compat_syscalls value was not incremented, breaking the build on
ARM64 systems.  This is fixed up later in mainline in the middle of a
merge point, which can't really be backported, so fix it up by hand here
instead.

Fixes: d8b0f546 ("wire up syscalls for statmount/listmount")
Change-Id: I88e7a6218480964c72135b0e1107039141b535e8
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>