Default CC should be cc not gcc
Default CC should be cc not gcc

Clang is much more common so use the OS cc instead of forcing gcc by default.

stevenh/golang-sys,darkliquid/golang-sys,darkliquid/golang-sys,stevenh/golang-sys,stevenh/golang-sys,darkliquid/golang-sys,darkliquid/golang-sys,stevenh/golang-sys