winebuild: Add support for PLATFORM_FREEBSD.

tools/winebuild/build.h

@@ -124,7 +124,11 @@ enum target_cpu
 
 enum target_platform
 {
-    PLATFORM_UNSPECIFIED, PLATFORM_APPLE, PLATFORM_SOLARIS, PLATFORM_WINDOWS
+    PLATFORM_UNSPECIFIED,
+    PLATFORM_APPLE,
+    PLATFORM_FREEBSD,
+    PLATFORM_SOLARIS,
+    PLATFORM_WINDOWS
 };
 
 extern char *target_alias;

tools/winebuild/main.c

@@ -64,6 +64,8 @@ enum target_cpu target_cpu = CPU_POWERPC;
 
 #ifdef __APPLE__
 enum target_platform target_platform = PLATFORM_APPLE;
+#elif defined(__FreeBSD__)
+enum target_platform target_platform = PLATFORM_FREEBSD;
 #elif defined(__sun)
 enum target_platform target_platform = PLATFORM_SOLARIS;
 #elif defined(_WIN32)
@@ -111,6 +113,7 @@ static const struct
 {
     { "macos",   PLATFORM_APPLE },
     { "darwin",  PLATFORM_APPLE },
+    { "freebsd", PLATFORM_FREEBSD },
     { "solaris", PLATFORM_SOLARIS },
     { "windows", PLATFORM_WINDOWS },
     { "winnt",   PLATFORM_WINDOWS }