fix linux api spec missing install directory

SPECS/linux-api-headers.spec

@@ -18,11 +18,11 @@ The Linux API Headers expose the kernel's API for use by Glibc.
 %build
 	make mrproper
 %install
-	cd %{_builddir}/linux-%{version}
 	make headers
 	find usr/include -name '.*' -delete
 	rm usr/include/Makefile
-	cp -rv usr/include/* %{buildroot}%{_includedir}
+	install -vdm 755 %{buildroot}/%{_includedir}
+	cp -rv usr/include/* %{buildroot}/%{_includedir}
 #-----------------------------------------------------------------------------
 #	Copy license/copying file
 	install -D -m644 COPYING %{buildroot}/usr/share/licenses/%{name}/LICENSE