Buildbot: tweaks for source directory

Need this so checkout of existing svn does not
interferes with new git checkout which would
need to be done.

build_files/buildbot/slave_compile.py

@@ -31,7 +31,7 @@ if len(sys.argv) < 2:
 builder = sys.argv[1]
 
 # we run from build/ directory
-blender_dir = '../blender'
+blender_dir = '../blender.git'
 
 if builder.find('cmake') != -1:
     # cmake

build_files/buildbot/slave_test.py

@@ -29,7 +29,7 @@ if len(sys.argv) < 2:
 builder = sys.argv[1]
 
 # we run from build/ directory
-blender_dir = '../blender'
+blender_dir = '../blender.git'
 
 if "cmake" in builder:
     # cmake