Fix discovery always having gig,sf2,sfz support disabled

source/discovery/Makefile

@@ -5,7 +5,8 @@
 #
 
 CWD=..
-include ../Makefile.mk
+include $(CWD)/Makefile.deps
+include $(CWD)/Makefile.mk
 
 # --------------------------------------------------------------
 
@@ -18,6 +19,9 @@ ifeq ($(MACOS),true)
 BUILD_CXX_FLAGS += -ObjC++
 endif
 
+32BIT_FLAGS += -DBUILD_BRIDGE
+64BIT_FLAGS += -DBUILD_BRIDGE
+
 # --------------------------------------------------------------
 
 ifeq ($(CARLA_VESTIGE_HEADER),true)
@@ -94,7 +98,7 @@ LIBS         += ../modules/juce_gui_extra.a
 LINK_FLAGS   += $(JUCE_GUI_EXTRA_LIBS)
 endif
 
-POSIX_BUILD_FLAGS = $(BUILD_CXX_FLAGS) -DBUILD_BRIDGE
+POSIX_BUILD_FLAGS = $(BUILD_CXX_FLAGS)
 POSIX_32BIT_FLAGS = $(32BIT_FLAGS) -L/usr/lib32 -L/usr/lib/i386-linux-gnu
 POSIX_64BIT_FLAGS = $(64BIT_FLAGS) -L/usr/lib64 -L/usr/lib/x86_64-linux-gnu
 POSIX_LINK_FLAGS  = $(LINK_FLAGS)
@@ -103,7 +107,7 @@ ifneq ($(HAIKU),true)
 POSIX_LINK_FLAGS += -ldl
 endif
 
-WIN_BUILD_FLAGS = $(BUILD_CXX_FLAGS) -DBUILD_BRIDGE
+WIN_BUILD_FLAGS = $(BUILD_CXX_FLAGS)
 WIN_32BIT_FLAGS = $(32BIT_FLAGS)
 WIN_64BIT_FLAGS = $(64BIT_FLAGS)
 WIN_LINK_FLAGS  = $(LINK_FLAGS) $(EXTRA_LIBS)