aarch64: Add +nosve to tests
This patch adds +nosve to various Advanced SIMD-only tests.
gcc/testsuite/
* gcc.target/aarch64/shl-combine-2.c: New test.
* gcc.target/aarch64/shl-combine-3.c: Likewise.
* gcc.target/aarch64/shl-combine-4.c: Likewise.
* gcc.target/aarch64/shl-combine-5.c: Likewise.
* gcc.target/aarch64/xtn-combine-1.c: Likewise.
* gcc.target/aarch64/xtn-combine-2.c: Likewise.
* gcc.target/aarch64/xtn-combine-3.c: Likewise.
* gcc.target/aarch64/xtn-combine-4.c: Likewise.
* gcc.target/aarch64/xtn-combine-5.c: Likewise.
* gcc.target/aarch64/xtn-combine-6.c: Likewise.