Auto-sync with upstream branch master
    
    Upstream commit: ea04f0213135b13d80f568ca2c4127c2ec112537
    
    - aarch64: Remove fpu Makefile
    - m68k: Use sqrt{f} builtin for coldfire
    - arm: Use sqrt{f} builtin
    - riscv: Use sqrt{f} builtin
    - s390: Use sqrt{f} builtin
    - sparc: Use sqrt{f} builtin
    - mips: Use sqrt{f} builtin
    - alpha: Use builtin sqrt{f}
    - i386: Use builtin sqrtl
    - x86_64: Use builtin sqrt{f,l}
    - powerpc: Use sqrt{f} builtin
    - s390x: Use fma{f} builtin
    - aarch64: Use math-use-builtins for ceil{f}
    - math: Decompose math-use-builtins.h
    - hurd: Add mremap
    - ia64: Use generic exp10f
    - New exp10f version without SVID compat wrapper
    - i386: Use generic exp10f
    - math: Optimized generic exp10f with wrappers
    - benchtests: Add exp10f benchmark