pip_packages: rebuild yaml wheel

The yaml module has an optional C extension that we aren't actually
building or including, but pip still marks it as "manylinux" even
if no C extension is compiled.  Manually build the wheel here by
removing the ext= field of setup.py to get portable none wheels.

BUG=chromium:1052692
TEST=CQ passes

Change-Id: I28027fd22f7cdf6df8fef7f31db31cbd8056d64c
diff --git a/pip_packages/PyYAML-3.12-cp27-cp27mu-manylinux1_x86_64.whl b/pip_packages/PyYAML-3.12-py2-none-any.whl
similarity index 77%
rename from pip_packages/PyYAML-3.12-cp27-cp27mu-manylinux1_x86_64.whl
rename to pip_packages/PyYAML-3.12-py2-none-any.whl
index e494eb1..9720a2b 100644
--- a/pip_packages/PyYAML-3.12-cp27-cp27mu-manylinux1_x86_64.whl
+++ b/pip_packages/PyYAML-3.12-py2-none-any.whl
Binary files differ
diff --git a/pip_packages/PyYAML-3.12-py3-none-any.whl b/pip_packages/PyYAML-3.12-py3-none-any.whl
new file mode 100644
index 0000000..80e5765
--- /dev/null
+++ b/pip_packages/PyYAML-3.12-py3-none-any.whl
Binary files differ