ARC: set proper address for loading standalone apps (above 0x8z)

Just because 0x8z it's translated address space.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
ARC: fix execution of standalone apps

We want stabs to be word-aligned as it is required by "bl" instruction.
Also we want to set global data in the same manner x86 does for the same
reason.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>