Just using the identifier ScriptIsComplex apparently results in the
address of its import stub, which has been linked into the calling DLL
(vcllo.dll). We need to look up that symbols from the handle of
usp10.dll to get the actual function's address, to be passed to
osl_getModuleURLFromAddress().

(Nothing magic with ScriptIsComplex here, it is just an arbitrary
function from usp10.dll.)

Change-Id: I If000d0c2eae3e3e32ce0ad1c26e545304d6f6d9e