File reproducible.patch of Package lilypond

--- a/stepmake/stepmake/c++-vars.make
+++ b/stepmake/stepmake/c++-vars.make
@@ -11,7 +11,7 @@ ALL_CXXFLAGS = $(ALL_CXXPPFLAGS) $(CONFI
 
 TCC_FILES := $(call src-wildcard,*.tcc)
 HH_FILES := $(call src-wildcard,*.hh)
-CC_FILES := $(call src-wildcard,*.cc)
+CC_FILES := $(sort $(call src-wildcard,*.cc))
 INL_FILES := $(call src-wildcard,*.icc)
 YY_FILES := $(call src-wildcard,*.yy)
 LL_FILES := $(call src-wildcard,*.ll)