fetch_sources.sh fails on extract of WebKit tar

[cbaggers]

Tried this on my macOS machine, which failed.

Turns out it was this line:

Baggerss-MBP:android-jsc Baggers$ tar -jxf WebKit-r174650.tar.bz2 -C jsc --strip 2 WebKit-r174650/Source/JavaScriptCore WebKit-r174650/Source/WTF
tar: Unrecognized archive format
tar: WebKit-r174650/Source/WTF: Not found in archive
tar: WebKit-r174650/Source/JavaScriptCore: Not found in archive
tar: Error exit delayed from previous errors.

Also tried on a fresh ubuntu install in a vm. Fails on same line

baggers@bbuntu:~/Code/android-jsc$ tar -jxf WebKit-r174650.tar.bz2 -C jsc --strip 2 WebKit-r174650/Source/JavaScriptCore WebKit-r174650/Source/WTF
bzip2: (stdin) is not a bzip2 file.
tar: Child returned status 2
tar: Error is not recoverable: exiting now

Any advice would be very welcome