Makefile.in: remove uClibc_uwchar.h and uClibc_va_copy.h on install

Signed-off-by: Peter S. Mazinger <ps.m@gmx.net>

Makefile.in

@@ -216,6 +216,8 @@ HEADERS_RM- := \
 	bits/syscalls.h \
 	bits/syscalls-common.h \
 	bits/uClibc_uintmaxtostr.h \
+	bits/uClibc_uwchar.h \
+	bits/uClibc_va_copy.h \
 	bits/sigcontextinfo.h \
 	bits/stackinfo.h \
 	tls.h \