common: Add simple dynamic array function.
* common/ccparray.c: New. * common/ccparray.h: New. * common/t-ccparray.c: New. * common/Makefile.am (common_sources): Add files. (module_tests): Add test file. (t_ccparray_LDADD): New.
- Signed-off-by: Werner Koch <wk@gnupg.org>