gimp: fix cross builds

gimp was calling pkg-config assuming that it won't be a wrapper for
cross builds, which resulted in cross flags getting leaked into native
tools.

srcpkgs/gimp/template

@@ -21,14 +21,12 @@ checksum=65bfe111e8eebffd3dde3016ccb507f9948d2663d9497cb438d9bb609e11d716
 python_version=2 #unverified
 lib32disabled=yes
 
-case "$XBPS_TARGET_MACHINE" in
-	arm*) nocross="https://build.voidlinux.org/builders/armv6l_builder/builds/24795/steps/shell_3/logs/stdio" ;;
-esac
-
 pre_configure() {
 	NOCONFIGURE=1 autoreconf -fi
 	if [ "$CROSS_BUILD" ]; then
 		sed -i 's:^py_prefix=`:py_prefix='"$XBPS_CROSS_BASE"'`:' configure
+		rm "${XBPS_WRAPPERDIR}/pkg-config"
+		export PKG_CONFIG="${XBPS_WRAPPERDIR}/${XBPS_CROSS_TRIPLET}-pkg-config"
 	fi
 }