Improve Petbuild integration

[sc0ttj]

In Pkg, you can build (compile) packages from source, with custom build options, but it requires the BuildPet (based on Iguleders buildpet).. To use it, you need to set BUILDTOOL=buildpet in ~/.pkg/pkgrc

Example, showing how to compile packages with custom options:

pkg build xarchiver --configure='--prefix=/usr/local --other-opts' --cflags='-D -02 -whatever'

It would be cool if petbuild supported passing these options.

Pkg would need an update here:

  # if we got a build script
  if [ -f "$BUILDSCRIPT" ];then
    cd `dirname "$BUILDSCRIPT"`
    # compile the pkg
    bash *.petbuild
    # after build, move any pets created to WORKDIR
    mv /usr/share/petbuild/0pets_out/*.pet "$WORKDIR" 2>/dev/null
    # back to prev dir (WORKDIR)
    cd -
  fi