Removing build.sh darwin symbols hack.  Adding '-g' to both CFLAGS and CXXFLAG to have cmake generation debug symbols in xcode.

MAINT-1753: Correcting behavior of ll_aligned_realloc_16() on Linux to avoid memory corruption in the case that the new memory size requested is smaller than the old memory size.  Also, adding check to ensure that the aligned malloc returns a non-null value before memcopying.

Update script that generates Google Breakpad symbols to look in tghe right place first and default to the original location if not found.