re PR testsuite/39831 (gcc.target/i386/excess-precision-*.c assume the default -mfp-math does not include SSE)

	PR testsuite/39831
	* gcc.target/i386/excess-precision-1.c: Use -mfpmath=387, and
	remove ilp32 requirement.
	* gcc.target/i386/excess-precision-2.c: Likewise.
	* gcc.target/i386/excess-precision-3.c: Likewise.
	* gcc.target/i386/excess-precision-4.c: Likewise.
	* gcc.target/i386/excess-precision-5.c: Likewise.
	* gcc.target/i386/excess-precision-6.c: Likewise.

From-SVN: r148395