AbstractBuffer: Generalize 'capacity' calculation, since we may encounter a byte-buffer w/ given elementSize semantics
UnixDynamicLinkerImpl: Unify impl. of openLibraryLocal(..), openLibraryGlobal(..) and lookupSymbolGlobal(..) - removing duplicate code.
Refine commit 5e01e993aeba4e95fc8aa6e75b3e295011e27bbb, skip Buffers.sizeOfBufferElem(..) call.