Make surgext deps simde build flags match main build

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

deps/Makefile

@@ -338,13 +338,12 @@ endif
 endif
 
 # same flags as applied to main build
-# SURGE_CXX_FLAGS += -DSIMDE_ACCURACY_PREFERENCE=0
-# SURGE_CXX_FLAGS += -DSIMDE_ENABLE_NATIVE_ALIASES
-# SURGE_CXX_FLAGS += -DSIMDE_FAST_CONVERSION_RANGE
-# SURGE_CXX_FLAGS += -DSIMDE_FAST_MATH
-# SURGE_CXX_FLAGS += -DSIMDE_FAST_NANS
-# SURGE_CXX_FLAGS += -DSIMDE_FAST_ROUND_MODE
-# SURGE_CXX_FLAGS += -DSIMDE_FAST_ROUND_TIES
+SURGE_CXX_FLAGS += -DSIMDE_ACCURACY_PREFERENCE=0
+SURGE_CXX_FLAGS += -DSIMDE_FAST_CONVERSION_RANGE
+SURGE_CXX_FLAGS += -DSIMDE_FAST_MATH
+SURGE_CXX_FLAGS += -DSIMDE_FAST_NANS
+SURGE_CXX_FLAGS += -DSIMDE_FAST_ROUND_MODE
+SURGE_CXX_FLAGS += -DSIMDE_FAST_ROUND_TIES
 
 # possibly use fftw?
 # ifeq ($(shell $(PKG_CONFIG) --exists fftw3 fftw3f && echo true),true)