app-portage/deltup: respect user's LDFLAGS, use CX, not CC

While at it dropped use of unknown command:
    epatch_user: command not found

Package-Manager: Portage-2.3.6, Repoman-2.3.3

app-portage/deltup/deltup-0.4.6-r1.ebuild

@@ -26,13 +26,13 @@ DEPEND="
 RDEPEND="${DEPEND}
 	|| ( dev-util/bdelta =dev-util/xdelta-1* )"
 
-src_prepare () {
-	default
-	epatch_user
-}
+PATCHES=(
+	"${FILESDIR}"/${PN}-0.4.6-ldflags.patch
+	"${FILESDIR}"/${PN}-0.4.6-cxx.patch
+)
 
 src_compile () {
-	emake CC=$(tc-getCXX)
+	emake CXX=$(tc-getCXX)
 }
 
 src_install () {

app-portage/deltup/files/deltup-0.4.6-cxx.patch

@@ -0,0 +1,23 @@
+diff --git a/Makefile b/Makefile
+index 6a3aa95..a591a6f 100644
+--- a/Makefile
++++ b/Makefile
+@@ -7,3 +7,3 @@ CC = g++
+ objfiles=bpatch.o archfunc.o file.o system.o tmpstore.o deltup.o 
+-libs=-lstdc++ -lz -lbz2 -lcrypto #-lssl
++libs=-lz -lbz2 -lcrypto #-lssl
+ 
+@@ -12,3 +12,3 @@ libs=-lstdc++ -lz -lbz2 -lcrypto #-lssl
+ %.o : %.cpp
+-	${CC} -c $< -o $@ ${CXXFLAGS} #-g #-Wall -pedantic
++	${CXX} -c $< -o $@ ${CXXFLAGS} #-g #-Wall -pedantic
+ 
+@@ -17,6 +17,6 @@ all: deltup
+ depend:
+-	gcc -MM *.cpp > .depend
++	${CXX} -MM *.cpp > .depend
+ 	
+ deltup: $(objfiles)
+-	${CC} $(objfiles) ${LDFLAGS} -o deltup $(libs)
++	${CXX} $(objfiles) ${LDFLAGS} -o deltup $(libs)
+ 

app-portage/deltup/files/deltup-0.4.6-ldflags.patch

@@ -0,0 +1,9 @@
+diff --git a/Makefile b/Makefile
+index 6a3aa95..6e7c5cf 100644
+--- a/Makefile
++++ b/Makefile
+@@ -20,3 +20,3 @@ depend:
+ deltup: $(objfiles)
+-	${CC} $(objfiles) ${CXXFLAGS} -o deltup $(libs)
++	${CC} $(objfiles) ${LDFLAGS} -o deltup $(libs)
+