Use the float/double assert macros.

The normal ASSERT_EQ macros don't work quite right for float/double values,
and result in false failures. Use the correct macros instead.

Bug: 13511379
Change-Id: Ic2feee7f3d3569f57b6453b8fa95222846c625cd
Fix LP64 libm for 128-bit long doubles

* reworked amd64/_fpmath.h and arm64/_fpmath.h to support 128-bit long
doubles.
* improved tests to cover long double cases
* made modfl an alias for LP32

Tests pass on x86, x86_64, arm, arm64 and mips.

Bug: 12921273

Change-Id: Ibe39acde57972447a8950fa45b1e702acc68ebeb

Conflicts:
	libm/arm64/_fpmath.h
We actually have modfl.

Change-Id: I22bb4d14f99a418819f2941c2dfec49094807c5f
Use the float/double assert macros.

The normal ASSERT_EQ macros don't work quite right for float/double values,
and result in false failures. Use the correct macros instead.

Bug: 13511379
Change-Id: Ic2feee7f3d3569f57b6453b8fa95222846c625cd
Workaround the GCC "(long)fn -> lfn" optimization bug.

Pass "-fno-builtin-rint -fno-builtin-rintl -fno-builtin-rintf" to avoid
generating self recursions in lrint, lrintl, and lrintf.

BUG: 14225968
Change-Id: Iffc4d8f0692580d636a529f4c8aa9a7a10d7acd8
Merge branch 'test' into master-kk