reorder includes so that the bundled fmtlib headers are taken first if devel/fmt happens to be installed

Index: src/tailer/Makefile.in
--- src/tailer/Makefile.in.orig
+++ src/tailer/Makefile.in
@@ -657,9 +657,9 @@ libtailercommon_a_SOURCES = \
     tailer.c
 
 libtailerpp_a_CPPFLAGS = \
+    -I$(srcdir)/../fmtlib \
     $(AM_CPPFLAGS) \
     -I$(srcdir)/.. \
-    -I$(srcdir)/../fmtlib \
     -I$(srcdir)/../third-party \
 	-I$(top_srcdir)/src/third-party/date/include \
 	-I$(top_srcdir)/src/third-party/scnlib/include
@@ -668,9 +668,9 @@ libtailerpp_a_SOURCES = \
     tailerpp.cc
 
 libtailerservice_a_CPPFLAGS = \
+    -I$(srcdir)/../fmtlib \
     $(AM_CPPFLAGS) \
     -I$(srcdir)/.. \
-    -I$(srcdir)/../fmtlib \
     -I$(srcdir)/../third-party \
 	-I$(top_srcdir)/src/third-party/date/include \
 	-I$(top_srcdir)/src/third-party/scnlib/include
