linux-user: Do not subtract offset from end address

When computing the upper address of a program segment, do not subtract the
offset from the virtual address; instead compute the sum of the virtual address
and the memory size.

Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>

linux-user/elfload.c

@@ -1824,7 +1824,7 @@ static void load_elf_image(const char *image_name, int image_fd,
             if (a < loaddr) {
                 loaddr = a;
             }
-            a += phdr[i].p_memsz;
+            a = phdr[i].p_vaddr + phdr[i].p_memsz;
             if (a > hiaddr) {
                 hiaddr = a;
             }