Configure: add $target{keccak1600_asm_src}.

Reviewed-by: NRichard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6042)

Configurations/00-base-templates.conf

@@ -34,6 +34,7 @@ my %targets=(
 	padlock_asm_src	=> "",
 	chacha_asm_src	=> "chacha_enc.c",
 	poly1305_asm_src	=> "",
+	keccak1600_asm_src	=> "keccak1600.c",
 
 	unistd		=> "<unistd.h>",
 	shared_target	=> "",

Configure

@@ -1359,6 +1359,9 @@ unless ($disabled{asm}) {
 	push @{$config{lib_defines}}, "SHA256_ASM" if ($target{sha1_asm_src} =~ /sha256/);
 	push @{$config{lib_defines}}, "SHA512_ASM" if ($target{sha1_asm_src} =~ /sha512/);
     }
+    if ($target{keccak1600_asm_src} ne $table{DEFAULTS}->{keccak1600_asm_src}) {
+	push @{$config{lib_defines}}, "KECCAK1600_ASM";
+    }
     if ($target{rc4_asm_src} ne $table{DEFAULTS}->{rc4_asm_src}) {
 	push @{$config{lib_defines}}, "RC4_ASM";
     }

crypto/sha/build.info

 LIBS=../../libcrypto
 SOURCE[../../libcrypto]=\
         sha1dgst.c sha1_one.c sha256.c sha512.c {- $target{sha1_asm_src} -} \
-        keccak1600.c
+        {- $target{keccak1600_asm_src} -}
 
 GENERATE[sha1-586.s]=asm/sha1-586.pl \
         $(PERLASM_SCHEME) $(LIB_CFLAGS) $(LIB_CPPFLAGS) $(PROCESSOR)