testsuite: Fix copysign tests on ilp32 x86 [PR109843, PR112472] PR tree-optimization/109843 PR tree-optimization/112472 gcc/testsuite/ChangeLog: * gcc.dg/tree-ssa/pr109843.c: Add -msse2 -mfpmath=sse for ilp32 x86. * gcc.dg/tree-ssa/pr112472.c: Likewise. Signed-off-by: Eikansh Gupta <eikansh.gupta@oss.qualcomm.com>