Fix alignment of thumb functions defined in assembly (#431)

- [x] Changelog updated / no changelog update needed

agb/src/agbabi/memcpy.s

@@ -14,9 +14,9 @@
 .include "src/agbabi/macros.inc"
 
     .arm
-    .align 2
 
     .section .iwram.__aeabi_memcpy, "ax", %progbits
+    .align 2
     .global __agbabi_memcpy
 __agbabi_memcpy:
     .global __aeabi_memcpy
@@ -115,6 +115,7 @@ __agbabi_memcpy1:
     bx      lr
 
     .section .iwram.memcpy, "ax", %progbits
+    .align 2
     .global memcpy
 memcpy:
     push    {r0, lr}

agb/src/agbabi/memset.s

@@ -16,9 +16,9 @@
 */
 
     .arm
-    .align 2
 
     .section .iwram.__aeabi_memset, "ax", %progbits
+    .align 2
     .global __aeabi_memclr
 __aeabi_memclr:
     mov     r2, #0
@@ -109,6 +109,7 @@ __agbabi_wordset4:
     bx      lr
 
     .section .iwram.memset, "ax", %progbits
+    .align 2
     .global memset
 memset:
     mov     r3, r1

agb/src/asm_include.s

@@ -17,7 +17,7 @@
 .macro agb_thumb_func functionName:req
 .section .iwram.\functionName, "ax", %progbits
 .thumb
-.align 2
+.align 1
 .global \functionName
 .type \functionName, %function
 .func \functionName

agb/src/save/asm_routines.s

@@ -31,7 +31,9 @@ agb_thumb_func agb_rs__WramVerifyBuf
     @ Returns from the function successfully
     movs r0, #1
 0:  @ Jumps to here return the function unsuccessfully, because r0 contains 0 at this point
-    pop {r4-r5, pc}
+    pop {r4-r5}
+    pop {r1}
+    bx r1
 agb_thumb_end agb_rs__WramVerifyBuf