Fix FBString's new includes
authorNicholas Ormrod <njormrod@fb.com>
Mon, 24 Feb 2014 20:53:47 +0000 (12:53 -0800)
committerDave Watson <davejwatson@fb.com>
Fri, 28 Feb 2014 21:59:57 +0000 (13:59 -0800)
commita88bcd70b7a8a3e485a9fa575d62c12adf0fa95a
tree376c23c0fc5608a228708b5eb087afec7f4ff3b2
parent764261c12ab059cd15607a1c2d2a7ff015dfe7ce
Fix FBString's new includes

Summary:
The headers <ext/hash*> were being included but not used when
_LIBSTDCXX_FBSTRING is defined. They have been relocated to within the
appropiate header block.

Test Plan:
fbconfig -r folly && fbmake runtests_opt

copy FBString and Malloc into libgcc, then
tp2_build libgcc/4.8.1/gcc-4.8.1-glibc-2.17-fb

Reviewed By: pgriess@fb.com

FB internal diff: D1187345
folly/FBString.h