[X86, testsuite] Fix PR rtl-optimisation/64895 XPASSes.

[X86, testsuite] Fix PR rtl-optimisation/64895 XPASSes.

These tests had started to XPASS on pic targets where the codegen
is now as expected.

2019-09-08  Iain Sandoe  <iain@sandoe.co.uk>

	Backport from mainline.
	2019-05-23  Iain Sandoe  <iain@sandoe.co.uk>

	PR rtl-optimisation/64895
	* gcc.target/i386/fuse-caller-save-rec.c: Remove XFAILs.
	* gcc.target/i386/fuse-caller-save.c: Likewise.
	* gcc.target/i386/fuse-caller-save-xmm.c: Adjust tests for
	PIC cases, remove XFAILs.

From-SVN: r275495