update gdb.base/info-program.exp to not fail with clang

update gdb.base/info-program.exp to not fail with clang

The test specifically mentions that it doesn't care where the program
stops, however it was still testing for a specific location.  The clang
compiler emits different line information for epilogue, so GDB reports a
different stopping location, depending on the used compiler.  With this
patch the test works even with clang.