Add forgotten test case for r203059.

2013-10-01  Kugan Vivekanandarajah  <kuganv@linaro.org>

        gcc/testsuite
        PR target/58578
        * gcc.target/arm/pr58578.c: New test.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@203116 138bc75d-0d04-0410-961f-82ee72b054a4