Include BoardSetup from BuildSetup

* while it seemed to work before, BuildSetup was actually adding includes from the default boot platform, before BoardSetup had a chance of changing it.

Jamrules

@@ -88,11 +88,4 @@ if $(HAIKU_BUILD_PROFILE) && ! $(HAIKU_BUILD_PROFILE_DEFINED) {
 	}
 }
 
-# Include embedded board-specific file.
-# UserBuildConfig can override HAIKU_BOOT_BOARD.
-if $(HAIKU_BOOT_BOARD) {
-	include [ FDirName $(HAIKU_BUILD_RULES_DIR) board $(HAIKU_BOOT_BOARD)
-		BoardSetup ] ;
-}
-
 PrepareConfigVariables ;

build/jam/BuildSetup

@@ -293,6 +293,13 @@ switch $(HAIKU_CPU) {
 	case * :
 		Exit "Currently unsupported target CPU:" $(HAIKU_CPU) ;
 }
+
+# Include embedded board-specific file.
+if $(HAIKU_BOOT_BOARD) {
+	include [ FDirName $(HAIKU_BUILD_RULES_DIR) board $(HAIKU_BOOT_BOARD)
+		BoardSetup ] ;
+}
+
 HAIKU_ARCH ?= $(HAIKU_CPU) ;
 HAIKU_ARCH_MACRO_DEFINE = ARCH_$(HAIKU_ARCH) ;
 HAIKU_DEFINES += $(HAIKU_ARCH_MACRO_DEFINE) ;