Fix build on Solaris with cc.
Fix build on Solaris with cc.

* SConstruct: Don't add -Wdeclaration-after-statement and -Wmissing-prototypes
              warning flags on Solaris, cc doesn't support them.

sworda/serf,blueszhangsh/serf,liuzongquan/serf,wzugang/serf,justinweb/serf,blueszhangsh/serf,justinweb/serf,muthusuba/serf,TommyU/serf,muthusuba/serf,sworda/serf,liuzongquan/serf,muthusuba/serf,wzugang/serf,Manouchehri/serf,justinweb/serf,blueszhangsh/serf,sworda/serf,TommyU/serf,Manouchehri/serf,Manouchehri/serf,sworda/serf,liuzongquan/serf,wzugang/serf,idomon/serf,blueszhangsh/serf,TommyU/serf,muthusuba/serf,krime/serf,krime/serf,idomon/serf,justinweb/serf,wzugang/serf,liuzongquan/serf,krime/serf,idomon/serf,TommyU/serf,idomon/serf,krime/serf,Manouchehri/serf