Working towards proper dependency handling for sieve binaries.

src/lib-sieve/plugins/include/ext-include-common.c

src/lib-sieve/plugins/include/ext-include.c

src/lib-sieve/sieve-binary.c

src/lib-sieve/sieve-binary.h

src/lib-sieve/sieve-script.c

src/lib-sieve/sieve-script.h

src/lib-sieve/sieve.c