Add more Unix platforms on which Skia for Chromium has been built,

this patch was tested on FreeBSD, Solaris, NetBSD, and DragonFly BSD.

http://codereview.chromium.org/8672011/



git-svn-id: http://skia.googlecode.com/svn/trunk@2764 2bbb7eff-a529-9590-31e7-b0007b416f81

include/core/SkPreConfig.h

@@ -30,7 +30,8 @@
         #define SK_BUILD_FOR_WIN32
     #elif defined(__SYMBIAN32__)
         #define SK_BUILD_FOR_WIN32
-    #elif defined(linux) || defined(__OpenBSD__)
+    #elif defined(linux) || defined(__FreeBSD__) || defined(__OpenBSD_) || \
+          defined(__sun) || defined(__NetBSD__) || defined(__DragonFly__)
         #define SK_BUILD_FOR_UNIX
     #elif TARGET_OS_IPHONE || TARGET_IPHONE_SIMULATOR
         #define SK_BUILD_FOR_IOS