The tests still fail.
gcc: Unexpected fails for rv64gc lp64d medlow
FAIL: gcc.target/riscv/scalar_bitmanip_intrinsic-32.c -O0 (test for
excess errors)
FAIL: gcc.target/riscv/scalar_bitmanip_intrinsic-32.c -O1 (test for
excess errors)
FAIL: gcc.target/riscv/scalar_bitmanip_intrinsic-32.c -O
Update v2 -> v3:
1. Change pattern mode form X to GPR in orcb, clmul, and brev8.
2. Add emulated testsuite.
3. Removed duplicate testsuite between built-in and intrinsic.
4. Typo fix.
Update v1 -> v2:
1. Rename *_intrinsic-* to *_intrinsic-XLEN.
2. Typo fix.
3. Intrinsics with immed
