d: Add float and double overloads for all core.math intrinsics

d: Add float and double overloads for all core.math intrinsics

For the math intrinsics: cos, fabs, ldexp, rint, rndtol, and sin, new
overloads have been added to the core.math module for matching float and
double types.  These have been implemented in the compiler.

A recent change to dump_function_to_file started triggering some
scan-tree-dump tests to FAIL, these have been adjusted as well when
updating the test.

gcc/d/ChangeLog:

	* intrinsics.cc (maybe_expand_intrinsic): Handle new intrinsics.
	* intrinsics.def (INTRINSIC_COS): Add float and double overloads.
	(INTRINSIC_FABS): Likewise.
	(INTRINSIC_LDEXP): Likewise.
	(INTRINSIC_RINT): Likewise.
	(INTRINSIC_RNDTOL): Likewise.
	(INTRINSIC_SIN): Likewise.
	(INTRINSIC_TOPREC): Adjust signature.

libphobos/ChangeLog:

	* libdruntime/MERGE: Merge upstream druntime 5e4492c4.

gcc/testsuite/ChangeLog:

	* gdc.dg/intrinsics.d: Adjust patterns in scan-tree-dump.