Add missing include
authorJosh Watzman <jwatzman@fb.com>
Thu, 4 Jun 2015 19:22:12 +0000 (12:22 -0700)
committerNoam Lerner <noamler@fb.com>
Fri, 5 Jun 2015 02:33:38 +0000 (19:33 -0700)
commit59badf857a28d6006edb483c12469ac37e54ef4a
treec5c8a273b6596696ab8a1e7422699e138c3c283c
parentdd5fa0122a9240c9c9c17c9d0eba13e8a4e60f6e
Add missing include

Summary:
`std::runtime_error` is defined in this header. Most build
systems seem to end up including it transitively anyways, but one version
of Clang on my Mac does not.

Test Plan:
`fbconfig -r folly && fbmake dbg` still works. Builds on my
Mac with MacPorts clang 3.6.

Reviewed By: ldbrandy@fb.com

Subscribers: folly-diffs@, yfeldblum, chalfant

FB internal diff: D2127268

Signature: t1:2127268:1433437985:546d0de71d8973d10f8ae3fdb6c61efae59444b9
folly/Executor.h