Place zyn deps in STATIC_CARLA_PLUGIN_LIBS as needed

Signed-off-by: falkTX <falktx@falktx.com>

source/Makefile.deps.mk

@@ -564,4 +564,14 @@ STATIC_CARLA_PLUGIN_LIBS += $(JUCE_GUI_EXTRA_LIBS)
 endif
 endif
 
+ifeq ($(EXTERNAL_PLUGINS),true)
+ifneq ($(DEBUG),true)
+ifneq ($(TESTBUILD),true)
+ifeq ($(shell $(PKG_CONFIG) --exists liblo fftw3 mxml zlib && echo true),true)
+STATIC_CARLA_PLUGIN_LIBS += $(shell $(PKG_CONFIG) $(PKG_CONFIG_FLAGS) --libs liblo fftw3 mxml zlib) -pthread
+endif
+endif
+endif
+endif
+
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