Make libcrypto position independent on i386

Prior to this change libcrypto ended up with a .text relocation.

Submitted by:	Rafael Espíndola (earlier version)
Reviewed by:	kib
Approved by:	so (glebius)
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D6164

secure/lib/libcrypto/Makefile

@@ -137,7 +137,7 @@ SRCS+=	cbc_cksm.c cbc_enc.c cfb64ede.c cfb64enc.c cfb_enc.c des_old.c \
 	fcrypt.c ofb64ede.c ofb64enc.c ofb_enc.c pcbc_enc.c qud_cksm.c \
 	rand_key.c read2pwd.c rpc_enc.c set_key.c str2key.c xcbc_enc.c
 .if ${MACHINE_CPUARCH} == "i386"
-SRCS+=	crypt586.s des-586.s
+SRCS+=	crypt586.S des-586.s
 .else
 SRCS+=	des_enc.c fcrypt_b.c
 .endif

secure/lib/libcrypto/i386/crypt586.S

@@ -14,7 +14,15 @@ fcrypt_body:
 
 	xorl	%edi,%edi
 	xorl	%esi,%esi
+#ifdef PIC
+	calll	.L1
+.L1:
+	popl	%edx
+	addl	$_GLOBAL_OFFSET_TABLE_+(.-.L1), %edx
+	movl	DES_SPtrans@GOT(%edx), %edx
+#else
 	leal	DES_SPtrans,%edx
+#endif
 	pushl	%edx
 	movl	28(%esp),%ebp
 	pushl	$25