windows link: only enable debug when we want symbols

Change-Id: I3c15c2d38c677ff6b3eba7bcc2520a99bd1b63db
Reviewed-on: https://gerrit.libreoffice.org/55242
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

solenv/gbuild/platform/com_MSC_class.mk

@@ -215,7 +215,7 @@ gb_Windows_PE_TARGETTYPEFLAGS := \
 	-release \
 	-opt:noref \
 	-incremental:no \
-	-debug \
+	$(if $(filter $(true),$(gb_SYMBOL)),-debug) \
 	$(if $(filter NO,$(LIBRARY_X64)), -safeseh) \
 	-nxcompat \
 	-dynamicbase \