This patch adds menuselect options for building Asterisk with
various sanitizers provided by gcc and clang.

When one of *SANITIZER flags is set in menuselect, the appropriate
option is added to CFLAGS ad LDFLAGS for the build.

Information on sanitizers in the project wiki:
https://github.com/google/sanitizers/wiki

GCC Manual:
https://gcc.gnu.org/onlinedocs/gcc/Debugging-Options.html

Clang Compiler User's Manual:
http://clang.llvm.org/docs/UsersManual.html#controlling-code-generation

ASTERISK-24718 #close
Reported by: Badalian Vyacheslav

Change-Id: Iafa51b792b7bcb20e848b99d16cf362d08590fa0