python: make sure to build the sqlite extension (again).

srcpkgs/python/template

@@ -1,7 +1,7 @@
 # Template build file for 'python'.
 pkgname=python
 version=2.7.6
-revision=2
+revision=3
 wrksrc="Python-${version}"
 short_desc="Interpreted, interactive, object-oriented programming language"
 maintainer="Juan RP <xtraeme@gmail.com>"
@@ -28,9 +28,9 @@ pre_configure() {
 }
 
 do_configure() {
+	unset CC LD AR AS RANLIB
 	if [ "$CROSS_BUILD" ]; then
-		env CC=gcc LD=gcc AR=ar AS=as RANLIB=ranlib \
-			CFLAGS=-Os LDFLAGS= ./configure
+		CFLAGS=-Os LDFLAGS= ./configure
 		make python
 		mkdir hostpython
 		mv python hostpython