Auto merge of #782 - SirVer:00_fix_repetition_operation, r=fitzgen
Auto merge of #782 - SirVer:00_fix_repetition_operation, r=fitzgen

Fix tests/test-one.sh.

On Mac OS where egrep is != GNU grep, the script fails with

~~~
egrep: repetition-operator operand invalid
ERROR: no files found with pattern "virtual_inheritance"
~~~~

The `$pattern` is supposed to be a substring in the test name to run.
The leading and trailing stars are wrong, since egrep takes a regular expression, not a glob.

emilio/rust-bindgen,emilio/rust-bindgen,emilio/rust-bindgen,rust-lang/rust-bindgen,rust-lang/rust-bindgen,emilio/rust-bindgen,rust-lang/rust-bindgen,rust-lang/rust-bindgen,emilio/rust-bindgen