arm: fix _init/_fini alignment in crti.o

This is just cbf59dd6 applied to arm.

crt/arm/crti.s

@@ -3,11 +3,13 @@
 .section .init
 .global _init
 .type _init,%function
+.align 2
 _init:
 	push {r0,lr}
 
 .section .fini
 .global _fini
 .type _fini,%function
+.align 2
 _fini:
 	push {r0,lr}