partial fixes

python/manylinux1/build_arrow.sh

@@ -65,6 +65,7 @@ for PYTHON in ${PYTHON_VERSIONS}; do
     echo "=== (${PYTHON}) Test the existence of optional modules ==="
     $PIPI_IO -r requirements.txt
     PATH="$PATH:$(cpython_path $PYTHON)/bin" $PYTHON_INTERPRETER -c "import pyarrow.parquet"
+    PATH="$PATH:$(cpython_path $PYTHON)/bin" $PYTHON_INTERPRETER -c "import pyarrow.plasma"
 
     echo "=== (${PYTHON}) Tag the wheel with manylinux1 ==="
     mkdir -p repaired_wheels/

python/pyarrow/io.pxi

@@ -571,6 +571,7 @@ cdef class MutableBuffer(Buffer):
             p[0] = <void*> self.mutable_buffer.get().data()
         return self.size
 
+
 cdef shared_ptr[PoolBuffer] allocate_buffer(CMemoryPool* pool):
     cdef shared_ptr[PoolBuffer] result
     result.reset(new PoolBuffer(pool))