* calls.c (expand_call): Recognize calls to "sqrt" and create
	corresponding notes.

	* g++.dg/bprob/bprob.exp: Load target-supports.exp
	* g77.dg/bprob/bprob.exp: Likewise.
	* gcc.misc-tests/bprob.exp: Likewise.
	* gcc.dg/builtins-18.c: Use builtins-config.h.  Do not test float
	variants on systems where the library does not provide that
	functionality.
	* gcc.dg/builtins-20.c: Use builtins-config.h.
	* gcc.dg/builtins-config.h: New file.

From-SVN: r75003