sys-devel/build-tools: Move CMake to native-only

It depends on libarchive, which is incredibly unsafe for cross.

sys-devel/build-tools/build-tools-1.ebuild

@@ -14,7 +14,6 @@ IUSE="+native"
 
 DEPEND=""
 RDEPEND="${DEPEND}
-    dev-util/cmake[doc]
 	dev-vcs/cvs[doc]
 	sys-apps/man-pages
 	sys-apps/man-pages-posix
@@ -29,6 +28,7 @@ RDEPEND="${DEPEND}
 	=sys-kernel/linux-headers-4.4
 	virtual/yacc
 	native? (
+        dev-util/cmake[doc]
 		dev-vcs/git[curl,doc,gpg]
 		dev-vcs/subversion[doc]
 	)