libobjc2: improve the test program a bit
libobjc2: improve the test program a bit

ngrewe/libobjc2,gnustep/libobjc2,gnustep/libobjc2,crystax/android-vendor-libobjc2,davidchisnall/libobjc2,darlinghq/darling-libobjc2,davidchisnall/libobjc2,crystax/android-vendor-libobjc2,ngrewe/libobjc2,darlinghq/darling-libobjc2