openjdk6: update icedtea 1.12 to version 1.12.8
openjdk-common.inc: fix qemu usage

* compile all binaries, which are executed by qemu, with the static compilerflag,
  because of a memleak inside qemu
* remove lib- and ld-path for qemu usage, because all binaries
  are compiled static now, openjdk7 seems to compile fine anyway