Update build_usd.py to use TBB 2017 Update 6

This conforms to the VFX Reference Platform CY2018

(Internal change: 2051645)

VERSIONS.md

@@ -18,7 +18,7 @@ Our test machines have the following software versions installed
 | CMake         | 3.14.6       | 3.16.5       | 3.16.5       |
 | Python        | 2.7.5        | 2.7.5,2.71.0 | 2.7.5,2.7.12 |
 | Boost         | 1.55         | 1.61.0       | 1.61.0       |
-| Intel TBB     | 4.4 Update 6 | 4.4 Update 6, 2017.0 | 4.4 Update 6, 2017.0 |
+| Intel TBB     | 2017 Update 6 | 2017 Update 6 | 2017 Update 6 |
 | OpenSubdiv    | 3.0.5, 3.4   | 3.0.5, 3.1.1 | 3.1.1        |
 | GLEW          | 2.0.0        | 2.0.0        | 2.0.0        |
 | OpenImageIO   | 1.8.9        | 1.8.9        | 1.8.9        |

build_scripts/build_usd.py

@@ -708,11 +708,9 @@ def InstallBoost(context, force, buildArgs):
 # Intel TBB
 
 if Windows():
-    TBB_URL = "https://github.com/01org/tbb/releases/download/2017_U5/tbb2017_20170226oss_win.zip"
-elif MacOS():
-    TBB_URL = "https://github.com/01org/tbb/archive/2017_U2.tar.gz"
+    TBB_URL = "https://github.com/oneapi-src/oneTBB/releases/download/2017_U6/tbb2017_20170412oss_win.zip"
 else:
-    TBB_URL = "https://github.com/01org/tbb/archive/4.4.6.tar.gz"
+    TBB_URL = "https://github.com/oneapi-src/oneTBB/archive/2017_U6.tar.gz"
 
 def InstallTBB(context, force, buildArgs):
     if Windows():