mkqt5bld: Patch prl files for Android (take 3)

Remove references to a static library in the NDK on the build machine for
linux x86, linux x86_64 and darwin x86_64.

Task-number: QTBUG-33660

Change-Id: I1e574086081fbe5bd07becff40789d3b730b741c
Reviewed-by: Iikka Eklund <iikka.eklund@digia.com>
Fix path formation when mixing unix and windows style paths

Change-Id: I6f6540bbd7a07eb0cf02068ff1d33fe9ffc0d795
Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>