cstore-tests: move remotefilelog py tests to .t test

Summary:
A future patch which renamed cdatapack.so to cstore.so pointed out that our
test-remotefilelog*.py tests are running against the system remotefilelog. Let's
move them to a .t test that sets the appropriate PYTHONPATH.

Test Plan: Ran the tests

Reviewers: #mercurial, simonfar

Reviewed By: simonfar

Subscribers: stash, mjpieters

Differential Revision: https://phabricator.intern.facebook.com/D4581281

Signature: t1:4581281:1487788843:365c6adf41ba51bdbe7394c1ab423fcc5a63bdbc

tests/remotefilelog-datapack.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 import hashlib
 import os
 import random

tests/remotefilelog-histpack.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 import hashlib
 import os
 import random

tests/test-cstore.t

@@ -0,0 +1,16 @@
+Get build path for native extensions
+- Do this as a separate script so we can eat the ls errors
+  $ cat >> $TESTTMP/getbuildpath.sh <<EOF
+  > BUILD_PATH="`ls -d $TESTDIR/`"
+  > BUILD_PATH="\$BUILD_PATH:`ls -d $TESTDIR/../build/lib* 2> /dev/null`"
+  > BUILD_PATH="\$BUILD_PATH:`ls -d $TESTDIR/../../rpmbuild/BUILD/fb-mercurial-ext-*/build/lib.*/ 2> /dev/null`"
+  > echo "\$BUILD_PATH"
+  > EOF
+  $ chmod a+x $TESTTMP/getbuildpath.sh
+  $ BUILD_PATH="`$TESTTMP/getbuildpath.sh`"
+
+  $ PYTHONPATH="$BUILD_PATH:$PYTHONPATH"
+  $ export PYTHONPATH
+
+  $ python $TESTDIR/remotefilelog-datapack.py
+  $ python $TESTDIR/remotefilelog-histpack.py