Fix build with GLM 0.9.9.

This patch is an amalgamation of these upstream commits:

https://github.com/LibreOffice/core/commit/953c4add8fd76d88f49a81ae4c21a1fdcc007e57
https://github.com/LibreOffice/core/commit/5f1bf6598b5725ad1e50ae9f7ec7524cc8a834fa

diff --git a/chart2/Library_chartcore.mk b/chart2/Library_chartcore.mk
index 28bc87b89057..69d4c0552636 100644
--- a/chart2/Library_chartcore.mk
+++ b/chart2/Library_chartcore.mk
@@ -23,6 +23,12 @@ $(eval $(call gb_Library_add_defs,chartcore,\
     -DOOO_DLLIMPLEMENTATION_CHARTVIEW \
 ))
 
+ifeq ($(SYSTEM_GLM),TRUE)
+$(eval $(call gb_Library_add_defs,chartcore,\
+        -DGLM_ENABLE_EXPERIMENTAL \
+))
+endif
+
 $(eval $(call gb_Library_set_precompiled_header,chartcore,$(SRCDIR)/chart2/inc/pch/precompiled_chartcore))
 
 $(eval $(call gb_Library_use_externals,chartcore,\
diff --git a/vcl/Library_vcl.mk b/vcl/Library_vcl.mk
index c1f3cc5324e7..0b684c6185a9 100644
--- a/vcl/Library_vcl.mk
+++ b/vcl/Lib</td></tr></table>
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