ld: Don't xfail ld-elf/warn[12] on 64-bit Solaris/SPARC

ld: Don't xfail ld-elf/warn[12] on 64-bit Solaris/SPARC

Two ld tests currently XPASS on 64-bit Solaris/SPARC:

XPASS: ld-elf/warn1
XPASS: ld-elf/warn2

They were xfail'ed on Solaris/SPARCv9 back in 2005

	https://sourceware.org/pipermail/binutils/2005-February/039268.html

but obviously this no longer appplies.

Fixed by removing the xfail's.

Tested on sparcv9-sun-solaris2.11 and sparc-sun-solaris2.11.

	* testsuite/ld-elf/warn1.d: Don't xfail on 64-bit Solaris/SPARC.
	* testsuite/ld-elf/warn2.d: Likewise.