g++.dg/warn/Warray-bounds-10..13: Fix for 32-bit newlib targets

g++.dg/warn/Warray-bounds-10..13: Fix for 32-bit newlib targets

See gcc/config/newlib-stdint.h, where targets that have
LONG_TYPE_SIZE == 32, get __INT32_TYPE__ defined to "long
int".

All these tests have "typedef __INT32_TYPE__ int32_t;".
Thus the tests fail for 32-bit newlib targets due to related
warning messages being matched to "aka int" where the
emitted message for these targets have "aka long int".

Tested cris-elf and x86_64-linux, committed as obvious.

gcc/testsuite:
	* g++.dg/warn/Warray-bounds-10.C, g++.dg/warn/Warray-bounds-11.C,
	g++.dg/warn/Warray-bounds-12.C, g++.dg/warn/Warray-bounds-13.C:
	Handle __INT32_TYPE__ being "long int".