All sdks are enabled by default, so that option doesn't need to be in distcheck.  However, idl is not enabled by default, so turn that on.

git-svn-id: svn+ssh://svn.code.sf.net/p/mingw-w64/code/trunk@5184 4407c894-4637-0410-b4f5-ada5f102cad1
diff --git a/mingw-w64-headers/Makefile.am b/mingw-w64-headers/Makefile.am
index 797629f..47871e3 100644
--- a/mingw-w64-headers/Makefile.am
+++ b/mingw-w64-headers/Makefile.am
@@ -26,7 +26,7 @@
 idlhead_HEADERS = @IDLHEAD_LIST@
 
 EXTRA_DIST = ChangeLog-2009
-DISTCHECK_CONFIGURE_FLAGS = --enable-sdk=all
+DISTCHECK_CONFIGURE_FLAGS = --enable-idl
 
 EXTRA_HEADERS = \
   include/*.dlg \
diff --git a/mingw-w64-headers/Makefile.in b/mingw-w64-headers/Makefile.in
index 5612967..309e4d4 100644
--- a/mingw-w64-headers/Makefile.in
+++ b/mingw-w64-headers/Makefile.in
@@ -257,7 +257,7 @@
 dxhead_HEADERS = @DXHEAD_LIST@
 idlhead_HEADERS = @IDLHEAD_LIST@
 EXTRA_DIST = ChangeLog-2009
-DISTCHECK_CONFIGURE_FLAGS = --enable-sdk=all
+DISTCHECK_CONFIGURE_FLAGS = --enable-idl
 EXTRA_HEADERS = \
   include/*.dlg \
   include/*.h \