szip: Fix test for Linuxbrew
szip: Fix test for Linuxbrew

Initialize c_stream or SZ_CompressInit fails intermittently.
Specify library path or cc fails outside of /usr/local.

Closes Linuxbrew/homebrew-core#41.

Signed-off-by: Shaun Jackman <b580dab3251a9622aba3803114310c23fdb42900@gmail.com>

rwhogg/homebrew-core,Linuxbrew/homebrew-core,Linuxbrew/homebrew-core,LinuxbrewTestBot/homebrew-core,maxim-belkin/homebrew-core,maxim-belkin/homebrew-core,forevergenin/homebrew-core,rwhogg/homebrew-core,LinuxbrewTestBot/homebrew-core,forevergenin/homebrew-core