Add cygwin toolchain
Add toolchain: analyze (clang static analyzer)
Add toolchain: sanitize_memory (clang memory sanitizer)
Add toolchain: sanitize_thread (clang thread sanitizer)
Add toolchain: sanitize_address (clang address sanitizer)
Maximum address sanitizer optimization level is -O1
Set HUNTER_DISABLE_SHARED_LIBS to YES for address sanitizer
Merge branch 'update' into update.linux