Error building 1.9.0 on CentOS-7

[Konstantin Ryabitsev]

Hello:

I checked the known bugs for 1.9.0, but there doesn't appear to be a match for
the one I'm seeing building gnupg-2.2.27 on CentOS-7:

	gnupg-2.2.27/PLAY/src/libgcrypt/cipher/blake2b-amd64-avx2.S: Assembler messages:
	gnupg-2.2.27/PLAY/src/libgcrypt/cipher/blake2b-amd64-avx2.S:217: Error: junk `()' after expression
	gnupg-2.2.27/PLAY/src/libgcrypt/cipher/blake2b-amd64-avx2.S:218: Error: junk `()' after expression
	gnupg-2.2.27/PLAY/src/libgcrypt/cipher/blake2b-amd64-avx2.S:220: Error: junk `()' after expression
	gnupg-2.2.27/PLAY/src/libgcrypt/cipher/blake2b-amd64-avx2.S:221: Error: junk `()' after expression
	gnupg-2.2.27/PLAY/src/libgcrypt/cipher/blake2b-amd64-avx2.S:267: Error: junk `()' after expression
	gnupg-2.2.27/PLAY/src/libgcrypt/cipher/blake2b-amd64-avx2.S:268: Error: junk `()' after expression
	make[4]: *** [blake2b-amd64-avx2.lo] Error 1

	$ gcc --version
	gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-39)

Best regards,
-K