aes/asm/{aes-armv4|bsaes-armv7}.pl: make it work with binutils-2.29.

It's not clear if it's a feature or bug, but binutils-2.29[.1]
interprets 'adr' instruction with Thumb2 code reference differently,
in a way that affects calculation of addresses of constants' tables.
Reviewed-by: NTim Hudson <tjh@openssl.org>
Reviewed-by: NBernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/4669)

crypto/aes/asm/aes-armv4.pl

@@ -200,7 +200,7 @@ AES_encrypt:
 #ifndef	__thumb2__
 	sub	r3,pc,#8		@ AES_encrypt
 #else
-	adr	r3,AES_encrypt
+	adr	r3,.
 #endif
 	stmdb   sp!,{r1,r4-r12,lr}
 #ifdef	__APPLE__
@@ -450,7 +450,7 @@ _armv4_AES_set_encrypt_key:
 #ifndef	__thumb2__
 	sub	r3,pc,#8		@ AES_set_encrypt_key
 #else
-	adr	r3,AES_set_encrypt_key
+	adr	r3,.
 #endif
 	teq	r0,#0
 #ifdef	__thumb2__
@@ -976,7 +976,7 @@ AES_decrypt:
 #ifndef	__thumb2__
 	sub	r3,pc,#8		@ AES_decrypt
 #else
-	adr	r3,AES_decrypt
+	adr	r3,.
 #endif
 	stmdb   sp!,{r1,r4-r12,lr}
 #ifdef	__APPLE__

crypto/aes/asm/bsaes-armv7.pl

@@ -740,7 +740,7 @@ $code.=<<___;
 .type	_bsaes_decrypt8,%function
 .align	4
 _bsaes_decrypt8:
-	adr	$const,_bsaes_decrypt8
+	adr	$const,.
 	vldmia	$key!, {@XMM[9]}		@ round 0 key
 #ifdef	__APPLE__
 	adr	$const,.LM0ISR
@@ -839,7 +839,7 @@ _bsaes_const:
 .type	_bsaes_encrypt8,%function
 .align	4
 _bsaes_encrypt8:
-	adr	$const,_bsaes_encrypt8
+	adr	$const,.
 	vldmia	$key!, {@XMM[9]}		@ round 0 key
 #ifdef	__APPLE__
 	adr	$const,.LM0SR
@@ -947,7 +947,7 @@ $code.=<<___;
 .type	_bsaes_key_convert,%function
 .align	4
 _bsaes_key_convert:
-	adr	$const,_bsaes_key_convert
+	adr	$const,.
 	vld1.8	{@XMM[7]},  [$inp]!		@ load round 0 key
 #ifdef	__APPLE__
 	adr	$const,.LM0