libarchive: Test for Clang builtin before using it

The __builtin_bswap16 builtin is not available on Clang 2.1.
This commit is contained in:
Brad King 2015-10-23 10:24:47 -04:00
parent 85e0bb84f5
commit 43d577dcb9
1 changed files with 4 additions and 1 deletions