h8300: zImage alignment fix

Missing alignment for .data section.
Sometime bootup failed.
Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>

arch/h8300/boot/compressed/vmlinux.lds

@@ -16,6 +16,7 @@ SECTIONS
         .data :
 
         {
+        . = ALIGN(0x4) ;
         __sdata = . ;
         ___data_start = . ;
                 *(.data.*)