python-2.7.15: Prepare and cleanups

Constraints are now created in the builddir, and thus
don't pollute the package root anymore.

python-2.7.15-2.build.sh

@@ -2,7 +2,7 @@
 
 PKG=python
 VERSION=2.7.15
-BUILD=1
+BUILD=2
 
 PREFIX=/pkg/$PKG-$VERSION-$BUILD
 # PREFIX=/dev/shm/pkg/$PKG-$VERSION-$BUILD
@@ -106,8 +106,8 @@ pip install Theano
 
 # these dickheads like to downgrade numpy, because there where problems on windows!
 # https://github.com/tensorflow/tensorflow > 88917888f509e3e61ffe632534476e7b09d3326a
-echo 'numpy >= 1.15.1' > dont_clobber_numpy_on_linux
-pip install tensorflow-gpu --constraint dont_clobber_numpy_on_linux
+echo 'numpy >= 1.15.1' > $BUILDDIR/dont_clobber_numpy_on_linux
+pip install tensorflow-gpu --constraint $BUILDDIR/dont_clobber_numpy_on_linux
 
 pip install biopython	# wird von bressin fuer python3 benutzt. klingt gut, ist in metaseq requirement drin
 pip install git+git://github.com/tanghaibao/jcvi.git # angefragt von Dr. Jun Yang
@@ -136,7 +136,7 @@ plaininstall dbus-python-1.2.8 dbus-python-1.2.8.tar.gz https://dbus.freedesktop
 )
 
 pip install keras
-pip install deeptools   # Alene vom Boemmel -> helpdesk 19.04.2017, 3.0.1 Laura Glaser -> Helpdesk 05.03.2018
+pip install deeptools   # Alena vom Boemmel -> helpdesk 19.04.2017, 3.0.1 Laura Glaser -> Helpdesk 05.03.2018
 
 pip install sphinx
 pip install recommonmark # Sabrina Krakau -> Helpdesk 21.06.2017
@@ -194,7 +194,7 @@ pip install hifive
 
 # https://hicexplorer.readthedocs.io/en/latest/index.html
 # HiCExplorer likes to downgrade practically everyting ...
-cat <<__CONSTRAINTS > such_a_lamer
+cat <<__CONSTRAINTS > $BUILDDIR/such_a_lamer
 numpy >= 1.13
 scipy >= 1.0
 matplotlib >= 2.1
@@ -212,7 +212,7 @@ unidecode >= 0.4
 configparser >= 3.5
 __CONSTRAINTS
 
-pip install HiCExplorer --constraint such_a_lamer --no-warn-conflicts
+pip install HiCExplorer --constraint $BUILDDIR/such_a_lamer --no-warn-conflicts
 
 # exit 1 # final test, inhibits 'closing' on success
 exit