[binutils-gdb] Skip floating point tests in return-nodebug.exp if gdb_skip_float_test is true

[sergiodj+buildbot at sergiodj dot net]

*** TEST RESULTS FOR COMMIT ae9cf263fdd47c30b997fcf4627609df77ca64c1 ***

Author: Yao Qi <yao.qi@linaro.org>
Branch: master
Commit: ae9cf263fdd47c30b997fcf4627609df77ca64c1

Skip floating point tests in return-nodebug.exp if gdb_skip_float_test is true

return-nodebug.exp does the test for various types, but we shouldn't
test with floating point type if gdb_skip_float_test returns true.

gdb/testsuite:

2016-09-02  Yao Qi  <yao.qi@linaro.org>

	* gdb.base/return-nodebug.exp: Skip the test if	skip_float_test
	is true and $type is "float" or "double".