testsuite: i386: Skip gcc.target/i386/shift-gf2p8affine-2.c on Solaris with as

testsuite: i386: Skip gcc.target/i386/shift-gf2p8affine-2.c on Solaris with as

The gcc.target/i386/shift-gf2p8affine-2.c test FAILs on Solaris with the
native assembler:

FAIL: gcc.target/i386/shift-gf2p8affine-2.c (test for excess errors)
UNRESOLVED: gcc.target/i386/shift-gf2p8affine-2.c compilation failed to produce executable

Excess errors:
Assembler: shift-gf2p8affine-2.c
        "/var/tmp//ccZMQ1Ad.s", line 30 : Illegal mnemonic
        Near line: "    vgf2p8affineqb  $0, %zmm1, %zmm0, %zmm0"
        "/var/tmp//ccZMQ1Ad.s", line 30 : Syntax error

Thus this patch only runs the test when gas is in use.

Tested on i386-pc-solaris2.11 (as and gas) and x86_64-pc-linux-gnu.

2025-12-15  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	gcc/testsuite:
	* gcc.target/i386/shift-gf2p8affine-2.c: Skip on Solaris
	without gas.