The 'snappy' flag is used consistently in 9 packages. Make it a global
flag.
Signed-off-by: Michał Górny <mgorny@gentoo.org>
slp - Add Service Locator Protocol support
smartcard - Enable smartcard support
smp - Enable support for multiprocessors or multicore systems
+snappy - Enable support for Snappy compression (as implemented in app-arch/snappy)
sndfile - Add support for libsndfile
snmp - Add support for the Simple Network Management Protocol if available
soap - Add support for SOAP (Simple Object Access Protocol)