qt5: add macro to fixup Qt5 .la and .prl files

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/qt5/qt5.mk

@@ -1 +1,11 @@
 include package/qt5/*/*.mk
+
+define QT5_LA_PRL_FILES_FIXUP
+	for i in $$(find $(STAGING_DIR)/usr/lib* -name "libQt5*.la"); do \
+		$(SED) "s:\(['= ]\)/usr:\\1$(STAGING_DIR)/usr:g" $$i; \
+		$(SED) "/^dependency_libs=/s%-L/usr/lib %%g" $$i ; \
+	done
+	for i in $$(find $(STAGING_DIR)/usr/lib* -name "libQt5*.prl"); do \
+		$(SED) "s%-L/usr/lib%%" $$i; \
+	done
+endef