pkgconf: Split pkgconf command into multi-line

The pkgconf command is a long and confusing line, which is about to get
longer. Split it up into logical stages so that it is easier to
visualise changes.

Signed-off-by: Thomas Preston <thomas.preston@codethink.co.uk>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/pkgconf/pkg-config.in

@@ -2,4 +2,7 @@
 PKGCONFDIR=$(dirname $0)
 DEFAULT_PKG_CONFIG_LIBDIR=${PKGCONFDIR}/../@STAGING_SUBDIR@/usr/lib/pkgconfig:${PKGCONFDIR}/../@STAGING_SUBDIR@/usr/share/pkgconfig
 DEFAULT_PKG_CONFIG_SYSROOT_DIR=${PKGCONFDIR}/../@STAGING_SUBDIR@
-PKG_CONFIG_LIBDIR=${PKG_CONFIG_LIBDIR:-${DEFAULT_PKG_CONFIG_LIBDIR}} PKG_CONFIG_SYSROOT_DIR=${PKG_CONFIG_SYSROOT_DIR:-${DEFAULT_PKG_CONFIG_SYSROOT_DIR}} exec ${PKGCONFDIR}/pkgconf @STATIC@ "$@"
+
+PKG_CONFIG_LIBDIR=${PKG_CONFIG_LIBDIR:-${DEFAULT_PKG_CONFIG_LIBDIR}} \
+	PKG_CONFIG_SYSROOT_DIR=${PKG_CONFIG_SYSROOT_DIR:-${DEFAULT_PKG_CONFIG_SYSROOT_DIR}} \
+	exec ${PKGCONFDIR}/pkgconf @STATIC@ "$@"