update to snappy

Change-Id: I86216ac2ef32e246c643c001cab59981d7e68474
Backport zram and zsmalloc

Change-Id: I80b38480affb0372aad6a4386e3b8fa83beb1383
fix

Change-Id: I44b0d1ff2e1036bc9adea4fb26396ad623e9a375