libsyntax: Make managed box `@` patterns obsolete
auto merge of #11518 : brson/rust/moreandroidxfails, r=alexcrichton
librustc: Remove `@` pointer patterns from the language
auto merge of #11305 : pcwalton/rust/at-patterns, r=pcwalton

r? @nikomatsakis
mk: Make TESTNAME and VERBOSE work with android. Closes #10957
std: Ignore bind error tests on android. #11530